Evolving App Store Business Models
Having shipped both paid and ad-supported apps myself, I'm coming to terms with the status quo of App Store business models. David has produced more apps than anyone, so his data is most likely typical. That last sentence kind of nails it.
"The market has been pulling me along towards advertising based apps, and I've found that the less I fight back with anachronistic ideas about how software “should” be sold, the more sustainable a business I have."