Best of the inbox: a newsletter that out-earned affiliate links with sponsorships

Best of the inbox: a newsletter that out-earned affiliate links with sponsorships
Monetization case studies usually pick one model. This operator A/B'd the business model itself.

📥 Swipe
— Sponsorship CPM beat affiliate RPM at their open rate — At 38% opens on 45k subscribers, a flat sponsor slot earned ~2.3x what the same placement made on affiliate commission. Worth your time: they share the open-rate threshold where the math flips, so you know which side of it you're on.
— Affiliate still won for evergreen content — Sponsorships paid for the broadcast; affiliate links in the automated welcome flow kept earning passively. They run both.

Made the cut for treating the monetization model as a testable variable with a break-even number.

Saved you ~2 hours and a premature 'affiliate vs sponsorship' decision.