Just wondered, how much does AdSense usually vary from day to day for other people. Not the total amount, just the variation. And whether this is reduced by having lots of sites, as a good day on one site balances out a bad day on another. I have three 'main' sites, and my best days are about two times as high as my worst days. When I had only one site, a good day was 5 times as high as a bad day. Interested to know others experiences. especially, does it even out more and more if you have lots of sites on different subjects?
It all depends on the ads that are being clicked. Of course, CTR will vary from day to day as well. There are some days you feel you have been smartpriced or something and then things return back to normal the next. One thing is that impressions are usually very consistent from day to day until it falls off some 20/30% at the weekends.