This is a known thing about NEM, the old devs dumped and manipulated everything. Even censoring their channels from people stating facts.
ProximaX claims to be the better improved NEM that split away from all the drama of the NEM community.
ProximaX did the right thing by taking the code with them and distancing themselves away from NEM.

This is interesting. I don't keep up with NEM
news false promises, so now it makes a whole lot of sense why they did this PnD. Basically NEM is a organization of pyramid schemes.
As soon as XYM is released on Binance (if it is...) XEM will go down to less than 100 satoshis. Dead scam coin.