They should open a BTC_B/BTC market. Customers with coins lost in the hack can sell their BTC_B at a discount to speculators banking on Bter making good on repaying them eventually.
That's a really good idea. I guess it's similar to people still buying GHs on cex.io in the hope that they might become worth more if cex start mining again. Bit of a gamble I reckon. I think there's more chance of BTER making good on repaying than cex becoming profitable.