Most of these "hacks" are inside jobs. They come up with excuses so they can easily run away with users' money. I've seen it time after time and it looks like this will never stop as long as there are greedy people in this world.
This are the staffs of the exchange that fired. Maybe, they are the technical manager or who officiates the technical part. Exchange never easily intercepted without an inside job. It has many computer programmers that stabilize the system. But because of these "inside job" thing, hackers can attack easily the exchanges.
Sounds funny, I've never heard of a case like this. Sounds like watching a drama movie on TV. But this might happen.
Hackers always learn anything and try to do anything to get a security hole.