"C2 is scheduled to be delisted on May 2, 2017. Please withdraw your C2 balance as soon as possible."

There is no reason to do that, the volume was good. Also delisted: BBR, BITS, C2, CURE, HZ, IOC, MYR, NOBL, NSR, QBK, QORA, QTL, RBY, SDC, UNITY, VOX, XMG