I saw an amazing increase in traffic on another one of my sites yesterday due to a television event. That site had a terrible .5% CTR, but... Another of my sites that usually does well anyway, saw the same traffic and CTR, but a greatly increased amount per click. Is this because overall, my CTR and EPC went way down, because of the weird new traffic on the first site I mentioned?
Amount you get per click depends on advertizers themselves. Perhaps, that day they irrationally decided to put more advertizing revenue into AdSense campaign due to some event. That may explain that jump.
Hmm, very interesting. Similar thing happened to me last week. Guess I'll have to try it again and see if the Adsense behaviour repeats...