Very unprofessional from those guys at bitgrail. they don't know how to respond to customers and there is nowhere written that minimum withdraw is 100
I think that is written somewhere or maybe that was the minimum deposit was 100 otherwise it wouldn't be credited. In any case the restrictions on withdrawals are obviously a ploy to keep your money there because that is the only coin they have of value. To BitGrail add more coins of value if you feel this will screw your business!