https://krebsonsecurity.com/2020/02/pay-up-or-well-make-google-ban-your-ads/
Google claims that they have systems to detect the fraudulent ad traffic, making the extortion threat empty. Then again Google has made their own bed by making it impossible to contact a human being who works there. It’s completely plausible that malicious actors could get your account banned and then there’s a kafkaesque process to get unbanned.