Is CTR actually clicking the ad and going to the advertiser's webpage or just interacting with the ad? If it's just like normal CTR, I don't see how iAds could result in a better performance. Maybe people like to play the mini-games, but no one would click through just because they liked the interactive aspect. The only reason to click through would either be curiosity or actual interest. Sure there's one developer who earned a jackpot, but what's the average payout for developers using iAds?