Another very american understanding of censorship. In Germany (where Codeberg is registered), censorship means censorship by a government. A private entity (Verein) deciding what and how they want to run their business is typically not considered censorship (maybe the term "private censorship" could work), but just "freedom of doing business". So if you want to argue FOR freedom, you could also turn this argument around and support the fact that a private entity should be able to decide whatever the fuck they want to do with their own service offering.

I don't view this decision as censorship, more like anti spam...