Too bad, they should have known Ethereum is a bugs riddle platform and shouldn't have offer on their exchange.
Too many bad things waiting to happen, this splitting bug will never go away.
it is the greed that will always cause loss of money, the more greedy people are the more they lose.
these exchanges resisted not adding ethereum for a long time but they saw the huge volume on poloniex and started doubting their first good judgement and despite all the signs they added it, and it is not just this exchange, there are a lot of them that did this recently because of the recent pump!
i say they deserve it.