Aug 30
The Oatmeal almost pegs it:
http://theoatmeal.com/blog/apps
But it isn’t the cost of apps that gets people down, it is the risk of being made a fool when it turns out to be a worthless piece of crap that you never use. Apple should have a system for returning crappy apps, or for trying apps for a day or so before having to buy them.
This would make Apple more, as app prices would rise, as would willingness to try apps.