An interesting piece of data they show is how often you click on Ads. I seem to do it about once a week, which I did not expect, as in my mind I almost never click on ads (although in a lot of those searches the Ad just leads to the actual site I'm searching for).
Looking at it confirmed what I thought: I just click on ads when I dislike the advertiser. Google usually gets a few cents whenever I search for GoDaddy, for example.
What are your rates, and are they surprising?