eCMP jumped from 0.9usd to 2usd in the entire account. So far so good.
When applying some filters we saw what made the spike: 2 ads on 3 specific pages, contextual and interest-based ads.
They had a eCMP of >1000usd... and revenue was around 30 times the daily average. CTR was higher than 100%...
We immediately removed the ad but are trying to understand if it is a reporting issue, an unprofessional advertiser or bad intention by a third party.
Has anyone encountered a similar issue?
PS: We did not change anything on these pages but added 2 different responsive ads on totally different pages, which do not appear in the reports yet, which is also bizarre.