I got 0 Clicks but my earning was $0.01 USD.. How is this possible ? It won't pay me for impressions also..
You don't always control which advertisers show their ads on your pages. If he choose to pay on CPM basis then thats what he will pay.
I get the same often. I think if you choose text/image ads, some CPM ads are shown along with others; thats why we get that penny.