Comment by quadruple

The thing with Linux cheats is that they were significantly easier to make(you didn't have to think about bypassing the anticheat at all, you could just read the game's memory or LD_PRELOAD your cheat in), and a lot more were publicly available(in true FOSS fashion, a lot of Linux cheats were open-source). A cheat that could cost $30-$60 a month on Windows could be free as in freedom(and free beer) on Linux.