trueplayer: I don't like curse sites and their so-called curse network. They have a bad history of malware problems and, in general, they promote and support quite the opposite business practices than GOG (DRM etc.).
GOG probably wants their money but this is nothing to brag about, IMO.
Actually, they're really supportive of gamers and treat them a lot better than most bigger companeis.
They have a partnership company thru YouTube where they pay the gamers that sign up with them a LOT more money (90 percent of revenue) than do any of the other partnership companies and they don't lock gamers in to lifetime contracts, like most of the other partnership networks do.
Look at Polaris (formerly The Game Station) on the other hand. Take a HUGE chunk of money from gamers that produce YouTube videos, and lock them in to lifetime contracts scamming them even more.
ETA: here's a video that explains about their YouTube partnership network - Union for Gamers - if I end up getting my YouTube channel up and running, I'd sign up with them in a second.
http://www.youtube.com/watch?v=e7vg91RHIeA