And as a side note. I reckon the best form of DRM is lots of updates. Torrent sites do not always keep supplying updates. A person just might get fed up and buy a game knowing this.
The problem of this is that 95% of the pirates encountering issues (wheter it are plain bugs or mere performance issues), blame it on the devs and write bad reviews and stuff like that, when most of these issue have already been fixed or addressed in patches they did not have because they pirated the game
They will probably blame, shout and point fingers instead of buying the game
