Gitea has a paid plan. On Forgejo forums you can find 3rd party offers of paid hosting as well.

Codeberg and Sourcehut are doing it for free, for open source. Corporate probably won't ever move off Github, because they need the prestige of using Github - the actual service quality is completely irrelevant. This is an aspect of the enshittocene epoch - I repeat, quality is irrelevant to corporates.