Did you see this in the little blurb ?
UPDATE: In addition, we mentioned that the user who will make the 6 millionth download will receive the whole GOG.com catalogue for free! It was not a prank and the user who should start "wrestling" with his virtual shelf full of awesome classics is Dotur who downloaded Icewind Dale 2 exactly on 2011-09-29 at 07:39:43 EDT. Congratulations! We'll send you the gift certificate with all the games from the catalogue.
Looks like "Dotur" got himself quite the game collection. lol