Soleron on 10 April 2013
I seriously doubt their data.
Dota 2 is clearly harder, less friendly, not even released (you have to really want it to seek out a key), and is identical to Dota 1, which was also free (WC3 is free). Their streams on Twitch usually have 1/2 - 1/3 of the viewers. Dota's main market, China, has not really switched over yet.
