I used to love the game Temple Run on the iPhone. I paid for it. I bought stuff in the game. And then they added advertisements.

That was the day that I deleted my favorite iOS game and never looked back. I was very disappointed in what had happened, but I am just that fed up with pervasive full screen advertisements.

Seems that other users are as well. A quick web search will show you a lot of altered .apk versions available for download.