Quake 2 has been GPL and had Linux versions since forever, even official ones from id.

I assume this remaster uses the same engine. Maybe they used stuff from contributors/forks, that’s why they kept it open.

Lemmy.ml actively asked people to sign up elsewhere. They have a small server and aren’t meant to be a general instance.

Lemmy.world is run by people who have one of the larger Mastodon servers, and actively advertises to be open and neutral.