In http://imgur.com/B86pJHi.png , what are the columns exactly, does anyone know? The 7th column in particular, with the %-ages. If that's a click-through rate, then the numbers look inflated.
Pretty sure that's CTR. It's really not that hight considering we're talking about a mobile app. People tend to tap at ads when they're trying to do something else, and that often leads to insanely high CTRs. Pretty sure this dude is paying someone to click on his ads and generate impressions so that the CTR is average.
The 80% figure is fill rate (AKA the percentage of impressions to requested placements), the 1.80-2.00% figure is the CTR, which matches the third column being impressions and fourth clicks.