What I wanted to convey was: people will fear making a buy request via PM due to the possibility that the message receiver would report the PM to staff and the person making the offer would get banned. (Unless the receiver is also willing to make the deal, so there's 50-50 risk factor for the person making the offer)
Its not a 50-50 risk because Im not going to flip a coin just because you (or someone else) writes me a PM about buying my account (I wont, any PM will be reported!). Just because there are two possible outcomes does not mean they are equaly likely. What hilariousandco is trying to tell you: people should allready be afraid of sending unsolicited PMs, because if they bother to many people -> ban.