In the past month or so I've noticed something new in regards to daily earnings on my sites. I'll check my Adsense dashboard first thing in the morning and make note that the total earnings up to that point is $17.62 with an RPM of $1.41. An hour later I check the dashboard again but the total daily earnings has dropped to $10.03 with a RPM of .75.
I'm seeing this a lot lately, sometimes twice a day, often every day. I'll take note that the earnings are humming along early in the morning and check back an hour or so later and the total earnings have dropped anywhere from 30 to 50%. I've been an Adsense publisher for seven years and I haven't seen this before.
I'm in policy compliance,not getting any messages that there are invalid clicks, etc.