curl killed its six-year bug bounty. Jazzband shut down. Ghostty, tldraw, NetBSD, and QEMU all closed the door on AI contributions in the same three weeks. This isn't paranoia. It's what happens when the cost of producing a plausible pull request hits zero and review capacity doesn't move.
curl and Jazzband and Ghostty didn't close the door because of an abstract "AI problem." They closed it because of specific people. Eight archetypes, all real, all currently in your notifications.
Parts 1 and 2 were about people who at least pretend to contribute. This one isn't. Cloned repos, faked commit history, blockchain-rotated malware C2, and a takedown that got re-squatted within a day. The impersonators don't want your codebase. They want your reputation.
MongoDB closed to fight AWS in 2018. Elastic closed to fight AWS in 2021, then reopened in 2024 once the fight was over. Ghostty, tldraw, NetBSD, and QEMU closed in January 2026, and there's no company to make peace with this time. Two different closings, two different endings.