I can only agree that the ads add to the site, as long as they do not become more obtrusive, I think we have to trust John to balance his obvious need for revenue against our need for hassle free surfing.
However, I had an interesting reaction when trying to open one of the ads this morning, for a company selling engine manuals. It resulted in an 'Access Denied. This site does not conform to accepted standards for company internet usage' With the result that an e-mail was sent to my boss informing him of my indiscression. Normaly I get the emails when the Ladies that work for me are checking the latest additions to the Ann Summers catalogue.
At work our internet use is closely monitered but very liberal in what is deemed suitable. The only time I've ever had a problem is when I tried to access an American Gadgets site that unknown to me was a front for selling AK47's, hand guns, crossbows, etc. There must be something on the site that our Big Brother did not like. Trouble is I've not seen it again at home tonight to have a look.
Luckily my boss lives in the real world and it was not a problem.