Great points. I agree there will be a backlash from contributors.
As far as I can tell they don't ask contributors to hand over copyrights, but they use the permissive MIT-style licence which permits the creation of non-Free forks.
Drew DeVault, of SourceHut fame, has written on this topic. [0][1] Drew's opinion is that he probably couldn't easily turn SourceHut to the 'open core' model even if he wanted to, on account of its use of AGPL-licensed code from contributors (who retain the copyrights).
As far as I can tell they don't ask contributors to hand over copyrights, but they use the permissive MIT-style licence which permits the creation of non-Free forks.
Drew DeVault, of SourceHut fame, has written on this topic. [0][1] Drew's opinion is that he probably couldn't easily turn SourceHut to the 'open core' model even if he wanted to, on account of its use of AGPL-licensed code from contributors (who retain the copyrights).
[0] https://sourcehut.org/blog/2022-10-09-ip-assignment-or-lack-...
[1] https://news.ycombinator.com/item?id=31963559