tangor - 9:48 pm on Jan 15, 2012 (gmt 0)
@trueman: my comment was based on who's there. Sometimes there just isn't anyone clicking, thus "estimates" are blitzed.
If the click is valid based on Google's algorithm, then it counts, if not, the click is discarded and we'll never know.
Personally, I don't run around trying to prove a negative. Seems a waste of time. :)
Second thought edit: Perhaps I'm not getting it (the question), so please keep that in mind. Estimated is just that. Invalid clicks is just that. Having both go south at the same time is not all that uncommon, but does hurt when we're already downturned in income.