ncreegan - 9:40 pm on Apr 25, 2005 (gmt 0)

Google is stupid if they thing advertisers will opt for both CPC and CPM when CPM looks to be the cheaper approach. Advertisers will always do whatever is cheaper.

Reading the support pages, I got the impression that CPM ads would only appear if the bid CPM for the CPM ad inventory was higher than the eCPM for the CPC ad inventory, or something to that effect...