You have to factor in operation cost as well. Attractions cost A LOT of money to operate. Think of the electricity needed to pump all of the water that flows through Popeye, or the power needed to launch the Hulk every thirty seconds all day. Contrary to popular belief, theme parks don't make that much money. What money they do make is because of the profit margin on food and merchandise. The profit of these games in this small area is a lot higher with almost zero operation cost, and minimum wage labour than an energy sucking ride that makes no profit and doesn't really draw crowds to the park.