Left an executive startup job in 2019. One idea: teach knowledge workers to build income solo, no team. Grew a newsletter to ~185K and turned it into $4M+/year at ~86% margins with zero employees
Quit finance, started a newsletter sharing mental models and life/finance frameworks. Now 800K+ readers feeding a book, courses, and an investment holding company. Showed mid-career pros that "writing what you're curious about" is a real business engine.
A working doctor who filmed study tips on the side. One obsession — productivity that doesn't burn you out — became a 6M-subscriber channel, a bestselling book (Feel-Good Productivity), and courses. Gave a generation permission to chase "feel-good" output over grind.
Ex-Airbnb PM who started answering product-management questions in public. Crossed 1M+ subscribers; the paid newsletter alone does $2M+/year, plus a $500K+ podcast and a job board. Turned "the advice I wish I'd had" into the #1 business newsletter on Substack.
Built a one-person business around a single thesis: in the AI age, your mind is the company. 175K+ newsletter readers, 2.6M followers, a software product (Kortex) — at a ~98% profit margin. The clearest living proof of your exact "one person, one idea, seven figures" stance.
Quit his job to write deep, funny breakdowns of tech and business. 250K+ readers, monetized mostly through sponsorships (~$20K+ per deep dive) — then parlayed the audience into a $50M venture fund. Proved a writing voice can become an investing platform.