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."
How many people do you know that download movies and smoke weed. By your logic your as guilty as they are since you didn't report the crime.
I don't believe staff knew of any doings that were illegal. It's likely they did not know as Paul Vernon was a recluse. Suspicion is far different from knowledge.
If and that's a big if the staff knew activities were illegal I hope they would have spoken up. It's likely the majority are just as confused as you and I to the truth of the matter. As far as I was aware Big Vern was the only one with access to the Bitcoin wallets through layers of security protocol. This gives me the most suspicion that the original crime was not quite as it seems.