Interesting. The CTR on the Deck Ads is impressive, especially considering the fact that the traffic is so highly targeted demographics-wise.

I'll bet you get a lot fewer fraudulent clicks and impressions (or as Google would say "Invalid Clicks") than you would using Google mobile or regular Google Display Network ads. The publishers of the sites you're advertising on aren't really incented to pump the numbers when they're all on flat rate. Either they have the influence or they don't.