I guess I haven't been an OSS maintainer in too long and might be a bit naive, but I still feel like completely incompetent "vibe-coded PRs" can't be that commo

I guess I haven't been an OSS maintainer in too long and might be a bit naive, but I still feel like completely incompetent "vibe-coded PRs" can't be that common... I understand why unqualified people try to spin-up X vibe-coded app that turns out to be a complete nightmare, but not why they would flood github with random PRs: there just doesn't seem to be all that much or even any incentive to push out PRs for free, especially if you more-or-less need a pro Claude subscription.