I've had my account with adsense for 3 years or something.
On one of my sites I make good money with the program each month, I always get paid for all the clicks.

For 5-6 days ago, I implemented adsense with another site I have.
So far I've only had 20 clicks - but none of the clicks have generated income.

The ads are are related to content, and I have of course never clicked on any of them myself.

Do any of you have any clue?

PS. I know it's a very small amount of clicks, but still... It should have been generating some income at least.