http://betakeygames.blogspot.fr/

Get your own CS:GO beta key today and start learning the game before everyone else gets it! These CS:GO beta keys are limited and we don't get new ones to pass out very often. If they are all gone you might have come too late and we're sorry that we couldn't provide more at the moment. However if you still see a clickable link to a CS:GO beta key then there's still hope for you !

http://betakeygames.blogspot.fr/