[necovek]

By definition, illegal copies of games don't have DRM protection. I'm not sure what you mean by this.

A game can have DRM restrictions or not when published. I am referring to games that never had DRM restrictions but which you obtained illegally (eg. you copied it from a friend or downloaded it from internet).

[Manuel_D]

Games that never had DRM restrictions to begin with are also pirated on day 1. There's no way to measure the sales before and after a crack is released, because the former period is basically zero.