I’ve been banned by the Circumventing Systems policy before (a few years ago), with no explanation of what system I circumvented or how the ban was triggered. Two appeals via the Google system failed (with generic responses) so I reached out to an ex-colleague who now works there and she escalated it internally, and I was magically unblocked, but still have no idea why it happened.
Recently launched a new startup and decided to look at Facebook ads, set up a brand new business account and page and the ad account was instantly banned. An appeal resulted in the message “your account has been consistently promoting ads that do not comply with our policies” but I’ve never run a single ad since they banned the account before I could even create one. The whole ecosystem feels like a bad joke at this point!