[Diamond Dave]

That is interesting. I received a different but similar report from Google. Actually it was a request from Google asking me if I would like to participate in an optimization study. I replied back saying I would, and they noticed that I run a lot of forums and gave me suggestions for improving the click through rates. I was a little bit suspicious at first as Google hardly ever sends me emails and thought it might be one of those Nigerian email scams lol

You can use up to three ads per page. Though personally I have found I make more money with two ads per page because the highest paying ads gets shown that way. If you have three ads it will display the lower costing ads as well. It is best to put your ads in the first half of the screen, anything below that gets less click through rates.