Who designed their system to require ALL multi-signature keys to sign instead of a majority? Talk about one of the stupidest decisions I've read about this year.
Suppose one got hit by a car, are all of OKEx's funds lost?
I guess they have already imagined that scenario, those keys are not in that person's head, they must be stored somewhere, in some device or a paper or whatever. They must have something planned, if not, their customers can be in a dangerous situation.