He makes $5 when the game is bought on its own; $2.50 when it's in a bundle. 770,628 units sold lifetime, 264,350 of them since this time a year ago — which means sales are speeding up and it's safe to assume he's netted more than $1,000,000.
http://kotaku.com/5676077/meet-garry-the-guy-who-re+made-how-we-re+make-pc-games








