Strong evidence (evidence grade B)
Build a free browser game with AI and sell ad slots inside it
Pieter's flying game sold ads, and a later note says it now earns nothing.
Unverified claim$87,000 a month, a $1M annual run rate, 17 days after launch (self-reported); later listed at $0 a month
- Cost: Free plan
- Setup: an afternoon
- Skill needed: Developer skills
