Walks away with $5 million prize. http://www.bit-tech.net/news/gaming/2014/07/22/newbee-wins-dota-2-international-championsh/1
That seem like a lot of money to me, but i guess when compared to other professional "sports" it pales in comparison, still a nice payday though.
It's not all there's either all teams have bills to pay. Looks like a nice amount on paper but split between the team + reserves then negative the bills sponsors (Most sponsors take 10% in this sort of thing) Ect. Costs to enter also this is not a free entry tornament all teams paid to enter.