My friend has a site that gets a very good amount of traffic, is highly optimized for search engines, great original content, etc. but his Adsense earnings are extremely low due to a very low revenue per click. He told me in the last week he has gotten around 1500 clicks and only 86 dollars. That's an average of about 5 cents per click. Have any of you guys experienced the same, and if so what did you do?