Many bitcoin users are much addict into online games and gambling they can have big profit for this kind of games like to learn more about this, you can go to gambling forum.
I agree, I think this would motivate the bitcoin users more. They can have fun and play and at the same time, they would profit from it. I've heard about steam before, that you can buy steam credits with the use of bitcoin but I haven't heard of the perspective of OP. It's a smart concept and these gaming industries will profit a lot. In a way, it's a win-win situation for the users and the gaming industry.