DubConqueror: Shouldn't the one who celebrates the anniversary be GETTING presents instead of GIVING them? On GOG"s birthday, all games cost twice as much, as a present to the company!
I think it's not only a company's birthday, but a community's birthday too.
One of them could not exist here without second of them.
Company gives to community some free games, and community gives to company more cash by buying more games than usual.
So everybody celebrate and are happy.