It is simple. Why making this meeting public? It is because of the bad reputation this scam got. They tried to build up trust to allure more people into this. To improve their reputation, they need some evidence. Such a meeting had tons of possibilities to gain reputation and prove something. But none has been used. There is no evidence for a meeting, no photo, no tickets, no hotel, nothing. This is not how you gain reputation back. It would have taken one minute to make a photo, one small minute. Not done, why?