He created something that moved 4000 units . $12,000 for 4000 (~$15/unit) units is pretty darn good. If you spent a year or two developing an iOS game, your hau

He created something that moved 4000 units . $12,000 for 4000 (~$15/unit) units is pretty darn good. If you spent a year or two developing an iOS game, your haul would have been half that. It looks like people don't buy books at high enough quantities to make it worth the effort.