Since no money ever comes back out of the "PDR exchange" and there is no working website or trading happening in it, it is perfectly reasonable to assume it is all a myth.
How can there be an "exchange" if it is not registered as an exchange with Panama's securities regulators, no trades can be made, (no buys or sells taking place, are there?) and anyone who puts their money in it can not take it out?
You should treat as spam any posts which maintain there is an exchange.