You see, here's Stallman being right once again. Stallman many times on many topics said he wouldn't use a product that's a walled garden and where his presence would contribute to that products dominance (i.e. network effects - everybody has to use it because everybody else is using it). People like the author said "I'll use github because it's beneficial to me in the immediate horizon, despite the fact that I'll be indirectly contributing to their assault on free software". Well, hard for me to care about the author now.
Anyway Forgejo[1,2] is FREE and COPYLEFT software, and Codeberg[3] is a pretty big forge. Forgejo also has on their roadmap to add some federated-type features, so that different people/organizations can host their Forgejo instances, but interact seemlessly with projects on other instances.
If this stuff matters to you, donate to Forgejo[4].