The only market ever with MANDATORY and REAL (without having to send the coins to ANY exclusively-market-controlled wallet) multisig, and the FIRST to implement is still dead today, without signs of coming back.
This was the only way to go. Multisig is useless if it is fully controled by the market, as we need to trust their ethics and security anyway. That's why nobody uses it on Evo, because if I have to send the coins to the main wallet someone might steal them from there after all.
Also, multisig needs to be mandatory. Hackers have less reasons to attack if there are 0 coins on the market. The third party multisig implemented afterwards made third party multisig easy as traditional escrow.
Forced PGP also makes it hard if not impossible for LE to find out anyone there.
But, in the end, it all comes down to customer service. Multisig is useless if nobody replies me when I need my coins back. The market was theoretically perfect in the admin's mind, and he tried to put it in auto-mode. The market was not perfect, nor are human relations. We needed human suprevision and we didn't have it.
The Market Place was just a concept, awfully executed. The Market Place may die, but the concept will stay forever :).
I don't think you know what official means.