The Update Last week I added notification ads to classical radio app. The returns has been pretty awesome. (Check out Leadbolt for solid notification ads) It has been my largest money maker for most of the days, and has been consistently among the top 3 money makers for me. I have now added sign up ads via Pontiflex into it. And that has yielded another revenue stream from the app. Whats interesting though, is that the notification ads have not received negative feedback. The app has gained a few 4 and 5 star ratings, and a number of Google +1. So, maybe, just maybe.... the opt-in method probably works fine. And the download increase has been awesome too, check this out (copied from the android market): Whats next? I am wondering, what if I, periodically, change the notification icons from the on-demand type it is now, to say a recurring one, maybe about once a week. That would show more ads to all that have my app. And maybe after 24 or 48 hours, change it ba