I built 623 web tools with AI. Ad revenue: about $0.07 a day. A post-mortem with real Search Console data

Numbers first. What I built: 623 browser-based web tools × 5 languages (ja/en/es/fr/pt) How: an AI-driven generation pipeline, nearly fully automated Current ad revenue: about $0.07 per day (roughly ¥10) Times a Google update wiped out my search traffic: 2 (March and May 2026) "Mass-produce with AI, monetize with ads" — I actually ran this playbook to completion, at what is probably an unusual scale for a solo operator. This is not a dream-selling post. It's an autopsy, with real Google Search Console data attached. How it started: "Can you build a web page?" There was no business plan at the origin of this project. My question to the AI was: "Can you build a web page?" It said yes — what kind of page do you want? I said I wanted the page to make money. The proposal that came back: "How about building a large number of web tools and earning ad revenue when people click them?" Even the name was the AI's idea — from the "Found it!" moment of discovering a tool: F