I re-read the original post and note these differences in my experience. I really only have one site that generates traffic/revenue. Google is erasing all clicks but one or two (so it says, but the earnings remaining may be for those that pay per view, not per click). I had a spike in revenue a few months ago, mostly due to better paying ads from content additions and a little bump in CTR from playing with ad placement/type etc. Since then, revenue has increased about 20% month. So if it's SEO issues, they are late in reacting. Maybe last month's month earnings triggered a threshold related investigation? Maybe I was click-bombed yesterday?