To note, even if the claim of 'more cheaters than Linux players' at the end of lifecycle is true, it is a blatant lie by omission. I played Rust from 2016 til shortly after the game went out of Early Access. I stopped playing because Facepunch had completely ruined the Linux builds of the game by removing the long-standing OpenGL output and forcing the new (at the time to Unity) and completely untested Vulkan output as the only option on Linux. For anyone unfortunate enough to experience playing Rust at the end of its Linux run, the game would regularly have major graphical glitches and various rendering errors, including graphical artifacting that would be seizure inducing. If you are prone to epilepsy or otherwise sensitive to bright or flashing lights, please do not click this link. To note, the attached video is a mild case of what commonly happened when playing. That is, if the crashes and many hardware just no longer being able to launch the game properly didn't impede that.

Given all of that, I genuinely wouldn't be surprised if the only "people" running the Linux client were actually cheat bots because there is no way many people were actually still playing the absolute rugpull of a game toward the end of its life.