I used to use it a lot in the early days as it was one of the few places where you could buy and sell with a decent amount of security.
It's probably been about 5 years since I last used it though as there are many quicker and simpler methods these days however my first thought was also this...
I thought it would be sold instead of shutting down because it is one of the most known exchanges in the btc community.
According to the coindesk article volumes have slumped but it's still doing $5-$7 million per week. Surely there's got to be some profit to be made.
Maybe the announcement will generate some interest from a buyer.