Sadly Steam is very much only caring about what the Publisher throws them Money at :(
Obviously we all care about Money especially Companies but atleast GOG has the decency of telling you to fuck off if you try to put any kind of Malware into your Game :P
Well except for Steamworld Builder which actually has some kind of Anti Cheat appearantly via Reading the Comments >.>
https://www.gog.com/en/game/steamworld_build




Just sucks that the SOurce is from Alex Springer -.-