That article about the T&S team is mostly Nonsense but I find this significant:
“Unlike hotels, we use predictive analytics, behavioral analysis, and machine learning to assess the risk of each and every host, guest, and listing on our platform. This real-time detection system instantly evaluates hundreds of risk signals to flag and then stop suspicious activity in the first place.”
So I conclude that nobody will tell you what offense you allegedly committed because NOBODY KNOWS.
Only the computer knows, and it’s not talking. Basically it just doesn’t like you.