I think you're right, quotas have been around as long as multi-user systems.

Their argument was economic, an economic solution would be good:

"It seems like many ‘vibe coders’ don't realize that they don't actually have a community around them. They build projects as if they had, and spend resources accordingly. We see projects having a lot of code activity, heavy CI/CD testing, frequent and large release binaries. Sometimes, it feels like the amount of supported platforms exceeds the amount of actual users.

To us, it seems ridiculous to see projects with a single developer and virtually no users consuming as much or even more resources than some of the largest community projects on Codeberg, which operate frugal with CI/CD and storage resources. We do not believe it is reasonable for Codeberg to invest our precious donation money into hosting of large ghost projects"

Ultimately, democracy is a respectable form of government and the group is free to change their mind later.