I just noticed that by default, in my account I had the option of interest based adverting enabled. While they claim it will maximize my revenue (and yes i do understand how), if I have a site on one of the high paying niches, say finances. This is a niche where MOST clicks don't go below 1 dollar. So, a visitor lands on my site after visiting niches that totally don't pay, and now that he is on my site, he will get ads served based on his previous search / visiting history and not based on my optimized keywords, is that right? If so, it's a total pitfall. I am switching now to not serving ads based on history / demographic etc and want to see what will happen, since I get good daily income, if it has a negative effect, i should feel it shortly. Anyone else has any experience with it?