Because currently I haven't found any other evidence, apart from transactions, so I have to receive real input to say whether the account is fraudulent or not.
They do have a very similar (if noy the same) posting style so there's that.
Another thing, GreenStox had a very different posting style in the past and aws actually enaging in discussions, compared to know being a classic sig campagn shitposter. Such a big change makes me think that account may changed hands sometimes in 2017.