There might also be an effect of people wanting more badly to like the app and "deluding" themselves... if I pay $0.99 for an app, I don't care too much if it w

There might also be an effect of people wanting more badly to like the app and "deluding" themselves... if I pay $0.99 for an app, I don't care too much if it works or not, but if I pay $29.99 I'm going to want to like it for reasons of self-validation.