The Artisan/Bag gold sink fallacy Over the first year, Diablo 3 will probably sell about three million copies, with just a trickle after that. So that's the box sales income. But this game has a micro-transaction model built in that will continue to generate revenue for as long as people play the game. So continued popularity is in this case clearly a profitable enterprise. So we have a player base measured in millions, who during their initial week of play will buy the Artisan upgrades and bag upgrades. And then they will be done buying upgrades, because they have them all. Then what? They are still generating billions of gold pieces every hour. The artisan and bag upgrade processes consume a finite amount of gold from an infinite stream of gold. The solution to an infinite outpouring is an infinite sink.