Just last week I had the biggest day Since joining Adsense in October. The total was $500 for the day thanks to the high EPC & CTR and it continued up to Father's day. I checked my channels and found some to have EPC as high as $3x.00 and eCPM in the $xx,#*$! which I reported to google.
Of course, Father's day traffic dropped but EPC and CTR remained high. The high earnings pattern came back on Monday.
Today, I got a response back from google that they appreciated the heads up and is monitoring any suspicious click patterns or activities. I also noticed that my stats are about 2-3 hours behind.
Could this be the result of google holding back some clicks for investigation? Which leads me to think that I should not have reported these spikes in earnings.