The title is sensationalized. I read the whole thread. Gitea doesn't seem to be "blocking" the PR. They aren't preventing it from going in a release. However, they did pull the in-progress PR into their private repo early, presumably in order to make more money. Not great, but not bad faith.
"Blocking" would suggest to me that the PR is rejected but still ends up in the closed-source codebase, which isn't the case at all.
@dang I flagged this because we're at risk of brigading a community over a nothingburger.