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So why the double standards?
I have seen umpty number of cases where the adsense bot does not have a clue as to what ads to display. In many cases it displays public service ads when the inventory does have many related ads to show.
I understand people can use 'google hints' to manipulate the ads but how does that make a difference as far as the clicks are legitimate?
If you are not sure what google hints is, it is a variant that allows you to tell google bot what the page is all about so it can display related ads. For instance, google hints="keyword"