I watched an interview in which Zach said that he gave infiniminer away for free because he didn't think anyone would want to pay for such a game. Ironically Minecraft is the video game that has sold the most copies.
So Notch wrote Minecraft, a better version, and sold it. And it worked out really well.
Infiniminer might have sold, but it wouldn't have sold as well as Minecraft.
And Minecraft then brought traffic to Zach (via people wanting to learn about Infiniminer) to drive sales on his other games, which seems to have worked out well in the end.
Throwing around the n-word makes him a bigot, not right-wing.