The Developer Newsletter Playbook: How to Build a Newsletter That Actually Makes Money in 2026 4/2/2026 TLDR grew from a side project to 7 million subscribers and an estimated $5-10M in annual revenue with a team of four people. Bytes built a massive JavaScript-focused audience that funds an entire educational platform. Developer newsletters are quietly one of the most profitable media businesses you can run, and they compound over time in a way that social media never will. Here is how to start one, grow it, and turn it into real revenue.