Maybe 7,000 page impressions? I've got a few times a couple of cents too... No click, just like you. So I think it's the page impressions
This is a commonly asked question. It means some advertiser(s) is advertising specifically on your website. In this case, you get paid for impressions..only a few cents, but you get paid for it.
Oh I see, so you do get some money for page impressions ? did not realize. Total page impressions right ? its cumulative ? Cause per day I only have less than 100 page impressions !!!!!!!
Here is a good explanation I just Googled: http://www.quickonlinetips.com/archives/2005/11/google-adsense-cpm-ads-earn-money-without-clicks/
Google also have CPM campaigns going, meaning you get paid for impressions instead of clicks, they are very few and very targeted.