Andrew Webster reporting for The Verge:
It could also be that players earn money too easily. Racking up “punchos,” Punch Quest’s form of currency, isn’t actually that hard, and since the game is so fun, jumping back in for an extra game or two to earn some more doesn’t feel like a chore. Because of this, players may be less-inclined to spend real money.
I’ve been playing a lot of Punch Quest over the past week and it’s one of my favorite games right now. But I’ll be honest, I didn’t even know it had an in-app-purchase model until I read this article.