You will find Big V acted alone and staff were bound by NDA's.
Im pretty sure an NDA is not enforceable when it comes to criminal activity.
I am 100% sure you cannot use the fact that you have an NDA to justify assisting criminal activity.
When they knew they had been hacked, and ran the exchange taking other peoples money to cover the losses,
they became part of the criminal act. No court in the world is going to accept the excuse "I kept the scam going because of my NDA,
so I can't be arrested."