This amount of money is insane. Dota 2 managed to generate almost the same amount of money selling an "e-pamphlet" (in the loosest sense) as compared to Star Citizen selling the promise of a game with ships so big you need > 1 person to fly it efficiently.
As of this writing, the prize pool is now $8,934,153! That's almost $9 million! Considering that only 25% of the compendium-related sales goes into the prize pool, that's about $36 million dollars selling this bloody e-pamphlet. For reference, Star Citizen is only up to $45+ million. Dota 2 made more money in 2 months than Star Citizen did in 2 years!