There are also NDAs at play.  If they come forward to anyone other than the government then they can be sued merely because of the NDA.  IT will also harm their ability to work in the future as many tech jobs require NDAs and breaching one makes you less employable in an already tight market.

I do know for a fact that there are NDAs for at least some of the people who worked at or with GAW in relation to paycoin and the cloud mining.  I do not know if every employee had to sign one.