Also there are other projects hosted there, and network effects involved.
Clearly they are setting limits on a case-by-case basis where needed. If something like GNOME was on Codeberg, they'd happily raise the storage quota for them. So they can also exempt you from the AI code rule if you have a really good reason, which you don't.
They have noted somewhere (it's linked in this thread) that most vibe-coders act like they're big and valuable software projects (like GNOME), and use commensurate resources, even though they aren't. This is what they want to block. If you were actually GNOME and you were vibe-coding, they'd probably let you.
This isn't very cool of you.
Then you would have been a supporting member, and had the opportunity to vote on this decision.