Could be lots of reasons.  I read in the other thread that he tends to keep the hot wallet empty.  It would make sense that he manually approves BTC withdrawals.  Before he honors any of them, if he has half a brain (I suspect he's pretty smart, but obviously still pretty green), he will audit the entire history because of the reports of duplicated trades and people trying to steal by exploiting the glitch.  In fact, here's my spiritual contribution on that front:

Glitch exploiters: You will suffer small pains (stubbed toes, getting sick, maybe cancer, maybe paranoia or some tainted weed that destroys your sense of smell, perhaps a sty in your eye that won't go away, maybe some botulism or insomnia) because of your depravity.  These ills will plague you until you make things right or die.  You know who you are.  You helped fuck up something that was pretty cool.*

Also, he's probably trying to deal with a lot of things right now, and pleasing his customers fell far down on the list of priorities when legal and financial issues with his bank and government got added.

*These things will happen to the rest of us too, but we won't let them bother us because we have conducted ourselves properly.  The conscience can be suppressed and buried, but look at what happened to Ronald Reagan after he insisted that he "could not remember" involving the US in the "Iran-Contra" affair.  The conscience kicks your ass no matter how much you suffocate it.  Be good.  Everyone (including you) will be happier.