I must say this kind of action speaks to the low emphasis on long-term credibility that this exchange has and a low concern for customers if they are willing to expose them to such volatility purely to fleece them for transaction fees.  I think some minimum level of responsible gate-keeping should be practiced by service providers of all kinds to prevent the whole crypto-coin environment from being tarnished by unstable and possibly fraudulent activity, unfortunately none do, the attitude is completely mercenary and "get rich" even amongst entities that should have long-term perspectives, the whole culture is rotten to the core.