conspiracy idea: how about this being just a plot to dump some coins at super high prices? Then the exchange goes back to normal and some people wtfpwnt themselves on trades. Because, why would they turn the exchange on and enable some withdrawals if they want to exit scam?
I think they are panicking. An employee has misappropriated funds and as a result they can't meet their obligations. The reason they haven't shut down the site yet is because they are not all dishonest. They are looking to salvage the situation as best they can.