He also takes in a lot through Twitch subscriptions. He has 30k+ subscribers from what he last said and each would pay him $2.50-$10 / mo. Of course Twitch would take their cut but thats insane.
Twitch negotiates cuts at 30k and they scale it back a bunch at that level also.
From what I've heard at around 10k subs you are getting around $4 a sub.