The ads are entirely optional. They don't pop up, they don't appear on a page. You literally have to click a link that specifies what it is and it is working wonders for the mobile devs as they make thousands of dollars a day using it. I thought it would be a nice way to give certain people an option. Because as of right now it's either paying your own money, or playing an ad in the background on mute for 30 seconds to spend the advertisers money while you get something for free.
Win-win in my view.