Sky High CTR and Decreased CPM

[ChrisReporting]

Hi,

Since 5 days now our CTR skyrocketed as reported by Adsense api and our Sitewide CPM went to roughly one third of what It was.

We didn't do any changes to the site. We have around 100k page views a day so those numbers are significant to me.

Did anyone experience this before? Any solutions? Would be greatly appreciated.

Thank you

[adrianTNT]

I think (like me) you might get hit with 90% earnings drop and "invalid activity" email days later.

[ChrisReporting]

did you find out what happened there?