Anxious your premise has wholes..
"Suppose a currency holder seeks the higher negotiated rate, gets it and then screws up by telling the facts surrounding the exchange, the bank can take action that may include forfeiture of the funds. Now here is the crunch. That person is now a loose cannon on the deck that has lost the exchanged funds and there is nothing stopping him/her from openly talking about the exchange terms. That would be disastrous for the bank, the Elders and all other exchangers. The cat is out of the bag and now runs wild. This defeats the purpose of NDA for everybody."
So who will this loose cannon tell ? Media? Family, Friends ..who's going to listen and believe ?? What does he have to prove it ..Oh a contract I guess.. I thought that this private negotiated exchange is a vary small window and will be closed to the public from this insiders privilege - pdq...And as we have no idea who is and is not cabal this whole assumed repercussion can be spinned and played out with smoke and mirror.or shell game.As Mandell House said they have a arsenal of plausible denial. So... the only one that will lose is the fool, for he has no chance against the mafia. (in short) No worries, no harm will come of it.
Peace Out Vee