EPC has gone up by about 15% since Saturday on most of my channels. No idea what's caused it. Can't be a single advertiser as it's gone up on a site that covers a range of subjects and does #*$!x clicks per day (so not a miniscule sample). Can't be smart pricing - which I understand is sitewide - as two channels are showing lower EPC. Oh well. Forget the stats and keep working on the sites.