My guess is that they can't comply with FinCEN rulings.
If it's the case, it's just one more example of how regulations kill businesses, and creates market concentration.
hahahahahahaha, big "if" and "guess"!! So, "if" not, then is it an example of a free market failing? Of course not, because blah, blah, blah, nonsense.
Ideology is for morons.
Bitfloor stole 24,000 BTC in September. They stole much more this time. Anyone who used them after the first time they robbed their customers is a sucker, plain and simple. Anyone who tries to find a way to blame this theft on the government, or anything else, is a fucking moron.