My EPC fell almost exactly 25% on the 8th and then over the course of the next 3 days slid another 15%. It appears to have rebounded a little bit this morning but I haven't really seen enough of the day to be sure.
Impressions, clicks and CTR have all remained consistent. It's the bottom line that's dropping - nothing else.
Anyone else seeing this or is it just me? Most of the time it's just me. In fact 99% of the time it's just me. I did think it was worth asking though.