Before 2/1 CPC = $1.65 I am not sure what is going on.
I agree Sine 2/1 cost per click has droped like a lead ballon. Here is a fictional example. (so I'm not violationg ToS.)
After 2/1 CPC = $0.52
My ctr is the same. However, due to the lower cpc my ecpm is now at a all time low.
Before 2/1 CPC = $1.65
I am not sure what is going on.