It’s about online games and anti cheat. Many companies will not allow anti cheat to work on Linux because they “require” kernel level anti cheat, a big security and privacy concern.
You can read more about anti cheat games and their compatibility with Linux here: https://areweanticheatyet.com/
I’m not sure I see the issue to be honest. The development is made in the open, the architecture is pretty flexible and is designed to be rather robust to rug pulls specifically such that less trust is required in the model.
Also, whenever these discussions happen, I can’t stop feeling that it is somehow also meant to imply that mastodon is somehow better. And I am not a fan of that, as if there could only be one good social network. The internet is better with multiple services, multiple of many things. That’s how there is cooperation, compatibility and development for the better.