Lots of clicks with low earnings

On one of the GC ad channels, in the past 7 days, I have over 5,000 clicks reported but less than $4 earned. It works out to about $0.0006 per click! I think the earnings are correct, but the clicks count is way too high.

On the other end of the scale, the footer ad on IP has my lowest CTR. I should try to sneak it further up the page somehow, but there is no good way to edit the template in that manner.

So far, the “AdSense Secrets” eBook has not been paying off.