Right, either they sell you the required item, or the gameplay becomes so difficult that the paid powerup is the only way to feasibly win. I don't know about "d

Right, either they sell you the required item, or the gameplay becomes so difficult that the paid powerup is the only way to feasibly win. I don't know about "drawing money from the rest of the eco-system", but a lot of games use this structure now, so it is changing how games are made and sold.