I hate in-app purchases because its a way for dev to exploit the average consumer. Download the app Paper, but then you have to pay more money to get the different digital pens. Some apps so as far as you pay for the game and then you have to pay for content to win games and the content you purchase is only good for a certain amount of time before you have to buy them again.
If it weren't for greedy companies and dev in-app purchases might be useful. Instead, in-app purchases have become as bad as day one DLC with respect to gaming.