Since October 6th, I've had 54,623 impressions and 382 clicks. But my earnings are 0. This is across several sites and channels. CPC and CPM were great for a couple months (started in July 2010) and then all of a sudden at the beginning of October, nothing. Any idea? I know invalid clicks could be a reason, but I haven't clicked on any ads and it can't be that all the clicks for several months are invalid. My content, domain, and search ads are fine. It's just mobile.
I know, but they're mobile ads on iPhone apps distributed around the world by Apple. And all 382 clicks for 4 and and half months?