http://www.polygon.com/2014/7/24/5931351/why-banner-saga-is-avoiding-the-budget-price-pitfall-of-the-app-store
Much more at the link.
Quote
They'll spend $600 on an iPad, and $4 on a coffee, drop $20 on lunch, but when it comes to spending four or five dollars on a game, it's this life-altering decision. I'm frustrated with that too.
Much more at the link.