Libra coin scam undetected by Facebook

[Razpunsel]

Here in Thailand a promotion for Libra coin was posted on Facebook for several months. There is a lot of victims as a result of this. You would think that Facebook would notice if someone was using their own crypto currency in a quite advanced scam like this. This gangsters from eastern Europe was allowed to continue without any interference from FB. How is this posssible? Reason for a mass law suit?