I was surprised to learn that BitMit only had about 30,000 activated accounts.  Seems like a pretty low number.  But it's hard to say how many people would be signing up now due to the increased media attention to Bitcoin.  BitMit definitely missed a lot of potential by closing when it did.

I think BitMit should have just stayed open after the hack but disabled escrow and referred users to a 3rd party escrow provider.  However, the government may have also caught up with BitMit and forced them to close due to the company not having an escrow license.