Why you don't think that this is a scam? Suspending my account - which has more than $550 in milestone payments there, for no clear reason and without any note

Why you don't think that this is a scam? Suspending my account - which has more than $550 in milestone payments there, for no clear reason and without any note, and even without any prompt communication! If this is not a scam.. then what the scam is?