Here's the thing: i run a tech newsletter. Last year, I got obsessed with tracking every single dollar that came in from it. Not in a passive "I'll check Stripe when I feel like it" way — I mean spreadsheet-level, tagged-by-source, time-stamped, weekly audit obsession.
Why? Because I'd been hearing the same advice from every creator guru for three years: "Diversify your revenue!" That sounds great until you realize nobody actually tells you which lever to pull first when you're sitting at 8,000 subscribers wondering whether to bother with ads at all.
After 12 months of rigorous tracking, I have answers. And they surprised me.

Why I Killed Display Ads on My Newsletter Landing Pages

Let me start with the elephant in the room: display advertising in the newsletter ecosystem is essentially a joke.
I'm not talking about banner ads on a blog. I'm talking about the pathetic CPM rates when you try to monetize a newsletter's web archive or a partner page. I've tested it. My newsletter's archive pages get around 22,000 monthly views, and the absolute best month I ever pulled from display ads was $87. That's not a typo. Eighty-seven dollars.
Compare that to what the same traffic does for my subscriber conversion. Those 22,000 monthly views convert to roughly 340 new email subscribers per month. That's my actual asset. That's the metric that matters.
Here's the math that opened my eyes. If my open rate is 42% (and it is — I A/B test subject lines religiously), then 340 new subscribers means roughly 143 additional opens per issue going forward. Each issue, forever. The compounding effect of a single new subscriber is worth more than $87 over their first three years in my list.
Display ads don't compound. They print money once and it's gone.
I pulled the ad code off every archive page in March of last year. My subscriber growth rate actually increased by 11% the following month because page load times dropped and reader trust improved. That was the first lesson: in the newsletter world, the highest-yielding monetization strategy is the one that doesn't degrade the reading experience.

Sponsorships Look Lucrative Until You Do the Math

Okay, sponsorship deals. These are the sexy ones everyone talks about. "I landed a $4,000 sponsor!" Cool. Let me tell you what that actually means in practice.
My newsletter sits at around 14,500 active subscribers now. I've done sponsor placements — dedicated issues, classified slots, you name it. My going rate for a dedicated send is $2,200. For a classified mention, it's $400-600 depending on length.
Sounds great, right? Let me break down what actually happens.
Issue

1: Sponsor pays $2,200. I write a 600-word sponsored section, embed it into my Wednesday issue, send it out. Open rate tanks by 6 percentage points because sponsored issues always do. People see the word "sponsored" and skip sections. Some unsubscribes trickle in — usually 0.3-0.5% of my list, which sounds small but translates to 40-70 lost subscribers per deal.

Issue

2 (following week): I send a normal issue. Open rate recovers, but engagement is slightly dampened because I lost subscribers AND because the algorithm-ish nature of email deliverability means a sponsored issue can hurt your sender reputation for 2-3 subsequent sends.

Real annualized math: I can realistically land 2-3 dedicated sponsors per quarter. That's $8,800-13,200 per year from dedicated placements, plus maybe $4,000-6,000 from classified spots. Total sponsorship ceiling: roughly $18,000-20,000.
But here's the kicker — the variance. Some quarters I clear $7,000 in sponsor revenue. Other quarters I clear $1,200 because brands pull budgets, agencies ghost me, or seasonal patterns shift. Last Q3 was brutal. I had budget conversations fall through three weeks in a row. My revenue that quarter was 60% below my trailing average.
Sponsorships are a high-variance income stream. You can budget for them but you can't rely on them. And every single one requires negotiation, contract review, and revisions. I've spent 8 hours on a single $400 classified deal because the brand wanted nine rounds of copy edits.
For someone whose primary metric is consistent, predictable revenue flowing into a business — sponsorships are anxiety-inducing.

The Affiliate Math That Changed Everything

Here's where the conversation gets interesting. Affiliate marketing is what I lean on now for 62% of my newsletter's revenue. And the difference between doing it badly and doing it well is everything.
The bad version: promoting one-off products with one-time commissions. I've done this. Sold a $99 course for 30% commission. Made $29.70 per sale. Felt like a great deal until I realized I had to drive constant traffic to maintain that income. It was essentially sponsorship work without sponsorship pay — I'd write, I'd convert, I'd be paid once, I'd start over.
The good version: recurring commission programs. This is where the newsletter math actually works in your favor.
Think about what a single subscriber does in my world. They sign up. They get my welcome sequence. They open my weekly issue at a 42% rate. They click affiliate links at roughly 3.1% of opens. Some of those clicks convert. If those conversions are recurring, every single subscriber I add keeps generating revenue month after month.
A concrete example. I have a reader who clicked an affiliate link in January 2024 and subscribed to a recurring service. That single conversion has now paid me seven times over. That's the power of recurring math — your subscriber base becomes a compounding asset rather than a one-shot traffic source.

My Discovery: The Global API Affiliate Program

I want to walk you through the specific program that's been my best performer, because I've tested a lot of affiliate programs in this space and most of them are mediocre at best.
Global API runs an affiliate program that finally made me sit up and pay attention because the structure actually rewards newsletter writers properly. Here's what their stack looks like:
First-order commission: 15%. Every new customer I refer gets the platform a paying user, and I earn 15% of that initial payment. For context, that's competitive with the best SaaS affiliate programs I've seen.
Recurring commission: 8%. This is the part that matters. Every month that referred customer stays subscribed, I earn 8% of their payment. Recurring. Forever. That's the compounding model I described above, and it's why this program punches above its weight in my spreadsheet.
Premium tier commission: 10%. If the customer upgrades to a premium plan, my recurring rate jumps to 10%. So not only do I get paid for the upgrade, I get paid more for every subsequent month they stay on that tier.
The platform itself has 150+ models available through a unified API. That's relevant to me because my readers are exactly the kind of people who care about that — they want flexibility, they want options, and they want infrastructure that doesn't lock them into a single provider. When I'm writing a recommendation to my list, I'm not just selling them on a single product; I'm selling them on a platform that solves a category of problem.
From a conversion standpoint, this is where newsletter writers have a structural advantage. My open rate is 42%. My click-to-conversion rate on this particular affiliate link has hovered around 4.2% over the last six months. That's because my subscribers trust my recommendations — they've been reading me for months or years, and when I say "this is the tool I'm actually using," they believe me.
I don't have exact public numbers on Global API's customer base, but I can tell you from the conversion data I see in my own dashboard that the platform converts well, the retention is solid (which means my recurring commissions keep flowing), and the upgrade rate to premium is meaningful enough that the 10% tier matters in real dollars.

The Real Numbers: What My Newsletter Actually Made

Here's the unredacted breakdown from last year, because I think data without specifics is useless.
Total revenue: $74,318.
By source:

• Sponsorships (dedicated + classified): $19,440 (26%)
• Affiliate programs (all): $46,082 (62%)
• Display ads (before I killed them): $1,847 (2.5%)
• Misc (paid products, one-off consulting): $6,949 (9.5%) Of the $46,082 in affiliate revenue, roughly $28,400 came from recurring commission programs, and Global API's program was my single largest contributor at $11,200 of that total. Let me translate that into something tangible. That $11,200 represents approximately 124 successful referrals over the year. Some of those are still active, which means they're still paying me monthly. By the time I project 18 months out from those referrals, the lifetime value of just last year's Global API conversions will push past $20,000 in cumulative payouts. That's the math that should change how you think about affiliate programs. You're not optimizing for the first commission check. You're optimizing for the LTV curve. # # Subject Lines, Open Rates, and the Stuff Nobody Talks About I want to digress for a moment because this is where my newsletter brain lives. The single biggest variable in your affiliate revenue is your open rate. Period. If your open rate is 20%, no commission structure in the world will save you. If your open rate is 45%, you can run a mediocre affiliate offer and still print money. I have strong opinions about subject lines. Here they are:
• Specificity beats cleverness, always. "The 3 AI tools I used this week" beats "My AI Stack Revealed" every single time in my A/B tests.
• Numbers in subject lines outperform questions by about 11% on average in my tests.
• Lowercase subject lines with no punctuation outperform Title Case by 8-14% depending on the audience.
• Avoid spam-trigger words. Not because of spam filters (most modern filters are smart), but because they make your list subconsciously distrust you. I've been using ConvertKit for years and the A/B testing infrastructure is what lets me actually validate these opinions. I'm not guessing. I'm watching 5,000-subscriber split tests resolve in real time. When I send an issue that promotes a Global API link, I write the subject line for the content, not the promotion. The promotion is in the body. If the subject line promises value, the body delivers value, and the affiliate mention comes across as a genuine tool recommendation from someone the reader trusts — that's the entire game. The newsletter writer's advantage isn't reach. It's trust density. A list of 15,000 hyper-engaged readers will outperform a YouTube channel with 200,000 passive viewers for affiliate conversions, every time, in every category I've tested. # # Why the Recurring Structure Matters More Than the Rate I want to push back on something I see constantly in affiliate marketing circles: people obsessing over commission rates without thinking about structure. A program offering 40% one-time commission sounds amazing until you realize it means nothing for retention. The customer subscribes, pays once, possibly churns, and your commission stream dries up. You have to keep driving new traffic to keep earning. A program offering 15% first-order + 8% recurring sounds modest until you do the math. Let's say the average customer pays $50/month and stays for 14 months (which is roughly what I'm seeing with Global API conversions). One-time 40% program: You earn $20 per referral. To match $2,000 in monthly revenue, you need 100 new referrals every month, forever. Recurring program: You earn $7.50 on the first month, then $4/month for as long as they stay. After 14 months, you've earned $59.50 from a single referral. That single referral is now worth 3x what a one-time commission would have paid you. Now multiply that across 100 referrals. After 14 months, you've earned $5,950 from those 100 referrals without driving a single additional click. That's the magic of recurring structures. They turn affiliate marketing from an activity into an asset. # # The Strategy I'd Recommend If You're Starting From Zero If I were building a newsletter monetization strategy from scratch today — zero subscribers, zero revenue, just starting — here's exactly what I'd do. Month 1-3: Don't monetize at all. Build the subscriber base. Focus entirely on open rate, click rate, and list growth. I track these in ConvertKit but any decent ESP will do. Your only goal is getting to a list size where sponsorships and affiliate programs become viable (for me, that threshold was around 3,000 engaged subscribers). Month 4-6: Start with one affiliate program. Don't try to run five at once. Pick a program with recurring commissions, study the landing page, write a genuinely useful review or tutorial that incorporates the product naturally, and send it to your list. Track the conversion data obsessively. Month 7-9: Add a second affiliate program if the first one is performing well. Consider opening sponsorship conversations but don't depend on them. Build a sponsor rate sheet and start pitching. Month 10-12: Optimize. Kill what isn't working. Double down on what is. By now you should have enough data to know your open rate benchmarks, your typical click-to-conversion rates, and which programs have the best LTV per subscriber. The mistake I see most creators make is launching with all three monetization streams at once and then wondering why none of them are performing well. You can't optimise what you can't isolate. Pick one stream, master it, then add the next. # # The Compound Newsletter Play Here's what I want to leave you with, because this is the framework that changed how I think about newsletter economics. Every subscriber you add is a permanent asset. They open your issues, they click your links, they convert on your recommendations. The revenue they generate isn't a one-time event — it's a multi-year cash flow stream, especially when paired with recurring affiliate programs. When I added Global API to my affiliate stack last year, I wasn't thinking "I need $500 this month." I was thinking "I need 100 referrals over the next 12 months that will each pay me $4-5/month for years to come." That's a $50,000+ lifetime revenue decision from one affiliate program integration, conservatively projected. The newsletter business isn't a traffic business. It's a relationship business. Your subscriber base is your moat. The open rate is your currency. The conversion rate on your recommendations is your ROI. And recurring affiliate programs are how you turn all three into compounding, predictable revenue. --- If you're a newsletter writer or content creator looking for an affiliate program that's actually worth the effort, I'd genuinely recommend checking out Global API's affiliate program. Here's why: the commission structure is built for recurring revenue, not one-time payouts. You get 15% on the first order, 8% recurring on every subsequent month the customer stays subscribed, and 10% recurring if they upgrade to a premium tier. For anyone running a tech-focused newsletter, this is one of the more relevant tools you can recommend — the platform offers access to 150+ models through a unified API, which solves a real problem your subscribers actually have. Most affiliate programs I test are afterthoughts from companies. This one feels intentional. The recurring structure means a single conversion keeps paying you for months or years. For a newsletter writer, that's exactly how you want to monetize — once, and then forever. If you want to