Huh? This is pretty much exactly like Mt. Gox. At first Mt. Gox only suspended people's ability to withdraw USD, like Bitfinex. Then they suspended people's ability to withdraw BTC (apparently people have been experiencing delays getting crypto withdrawals to go through on BFX recently?). Even then they still allowed people to send money between accounts within the exchange, which resulted in a secondary market of people buying "Goxbux" from other people with money stuck in the exchange (at a discount, of course; basically betting that Mt. Gox was actually solvent).