By "major contributors like CD Projekt Red" I assume you mean "owners". Good Old Games was created and is owned by CD Projekt so it's not exactly fair to simply call them "major contributors". :)
Thanks for the information, I didn't know they are the owners. That's even better, it shows how a serious and successful games production company can promote DRM free approach. They used to rely on DRM before, but I guess they reconsidered at some point, and turned it completely around.
