Thanks for a great plugin!
However there is a little problem – it counts every show of an ad roughly 10 times.
I know how often my site was viewed via Google Analytics and multiplied that number with my ad places. The result is a rough estimation of the maximum times all ads could be shown. If I add the counted (your plugin) ads together, I get a much higher number – roughly 10 times. Of course those calculations are all made in a fixed span of time x.
Do you have an explanation?