Just in the last 3 days I have gotten a few cents for 200 visits and no clicks. Just now I have 2 cents for 28 impressions, how is this possible.
I think it works on keywords. some keywords such as "xbox 360" will have a much higher advertiser bid value than say "victorian hoover" ( lol ). So when these adverts are clicked on, you get a much higher rate (in theory), especially with a lower number of advert/page impressions. It happens from time to time, I just wish it was more frequent on my website.. lol