i don't really get the point of this, apart from addictive game play..
If there is an ad you must watch to score extra points, wouldn't this actually be a downside ? You'd just delete the app. know its extra revenue, but i would.
Just do the honorable thing and "play it straight, up front" just charge more for the app in the store instead of making it Free, and they'll be no need for stuff like this which hinders game play, even if it may be overwhelming addictive like "Simpsons: Tapped out"
Personally, they just bought it on themselves... They can't put a price, so they'll make it free cos that's what we all like, but then we will prevent you from getting extra lives, until you sit through an ad..
No thanks. I just wanna play.