But the server code has been part of games for ages. You could argue even a game like Minecraft (which is not totally DRM free) includes the server code, so pl

But the server code has been part of games for ages. You could argue even a game like Minecraft (which is not totally DRM free) includes the server code, so players (and companies) can setup servers as they please. The only reason I can see for a game to not include the server-side code is to hold the users hostage. 5-10 years from now, nobody will be able to play these games because the servers will be discontinued. We effectively "rent" them because of this.