Originally Posted by CountChocula 
Only for GOG, which was a fraction of TW2 digital sales compared to Steam.
No, all digital. CDP is the publisher on Steam, not Atari. Valve gets their cut, but that's it.
At any rate, since CD Projekt derives a lot of revenue from other sources, like distribution of movies and third party games in Eastern Europe, maybe they are still doing just fine even if The Witcher 2 was not very profitable.
I'm not sure TW2 is "not very profitable". CDP is going for relatively high price sales for a long time. I doubt the projection was higher than 1.7M units for close to full price within such a short time. They'll easily double or triple this number down the line, for a lower price.