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Why is it whenever I enable text/img ads -- at the constant prompting of Adsense -- my CPC craters?
I would be VERY surprised to hear of anyone's earnings/CPC going up by changing to Text Only in the current AdSense program.
They recently suggested I change from bordered/text/image ads to noborder/text-only. I did, it works great, CTR went way up and EPC more than doubled. Still working great.