That is very interesting. I always like to hear counter examples. Have you had any success in turning downloads into revenue? Does the ad model work for your app, or is most of the revenue from in app purchases as in the article?
Off the top of my head, I think 95% of my revenue is from ads. I have plans to work on improving IAP conversion since I don't like the fact that I show ads. This article got me thinking about what I can offer more than just "remove ads".