DoTA 2 - $1,000,000 Prize Tournament.

http://www.dota2.com/
 (I know there is a DoTA2 board, but this doesn't have anything to really do with the fundamentals of the game.)
I love video games and I love competition, but why? I mean do they want to really market/push the game by doing this? Seems sort of excessive in my opinion.

Free publicity while adding tons of incentive for players from the other game to jump ship and come over to DotA 2.