They are not dead yet, estimated amount taken is between 3 and 13 million dollars, by some news and social medias. Maybe they will recover from this hack and continue to work. Even thou some exchanges were hacked for much more money they recovered from that and they are still active. We will see what will happen with this, there is nothing new for days about them, community just passed over that like it`s nothing or its seems like that.
And some other exchanges are spreading their businesses over the seas, growing making more money, how they can be dead when on one dead exchange 10 new comes out. Look around and you will see what am I talking about.