Linux gaming is at a point where the only games that don’t work are the ones being actively blocked by the developers, mostly through anti-cheat systems. Just install a stable distro like Ubuntu or Fedora, and use Steam, Lutris and/or Heroic to manage the games and compatibility layers needed for them.

Website hosting costs most likely.

I had that issue for a while and it turns out I forgot I had an extension changing my user agent. After I changed it back to default everything worked fine.