Facebook made a big change in their advertising policies this week.
But they did it very quietly with a letter to display advertisers telling them that if you want Facebook traffic, you’d better be buying CPC.
The letter, sent out at the end of last week, told CPM advertisers that henceforth they, “will continue to receive impressions but may receive less clicks.”
And, “if your most important objective is to drive clicks on your ads, you should change your bids from CPM to CPC.”