This thread, together with the other thread is more than just suspicious.

Regarding the linked thread.. i mean come on.. Who receives a message saying "please send a message containing address X to account Y" and does exactly that.
This is either some kind of extremely stupid behavior or some kind of a reinsurance if you get called out (i.e. "i received the message and blindly did what the person i don't know requested").

I mean, alright. Benefit of the doubt.
But together with this here, i tend to believe it indeed was just a reinsurance for himself instead of just stupid behavior.