You can buy games using Bitcoin, I know that for a fact, but there has never really been a need for me to buy any games from them since they typically do not have anything worth playing, aside from the occasional neat racing game like forza horizon which I kind of wanted to play but decided against it.

I don't know if they sell many, or any, of their other products for Bitcoin, but I don't know if there would be any kind of real improvement that would come from such a program set out by them. It might have a minor impact on the community when it comes to the price, but most people won't buy anything from them. I would be willing to put money on it.