“We believed you when you promised to pass along the ownership of the Gitea project to your elected successors.”
The Gitea community elected its maintainers and trusted them to hold the domains and trademark. Two of them moved both into a new for-profit company and announced it after the fact. The letter asked for them back. Gitea Ltd said no, and the community forked it as Forgejo. Open source code is easy to fork. The name is what they took.