numnum - 7:06 pm on Oct 27, 2011 (gmt 0)
Is it remotely possible that Goog would throttle CPC down as CTR increases (and vice versa)? I know: that would seem to make no sense. But lately the two have been inversely related, at least for my account. For example, yesterday the CTR for my 336X280 unit was nearly triple its average, but the CPC was about 1/3 of its average. And I didn't notice any difference in the types of ads being displayed in that unit. Otherwise, I might have assumed that the unit was displaying an unusually enticing but low-paying image ad.