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!
The minimum withdrawal has always been there I believe. The minimum deposit is just strange, especially because they encourage you to send over at least a 1000 rai, otherwise you'll be charged 5 rai.
I think that people are angry now because they've implemented a restriction (without announcement) where you need to verify yourself prior to being able to withdraw (no verification required up to 0.5 BTC). Even when you're verified, you can only withdraw 1.5 BTC per day. It's absolutely ridiculous, but also mind blowing that they'd rather spend time implementing features to "lock people in" rather than resolve the issues their platform is dealing with....
The whole reason they need to lock people in in the first place, isn't necessarily coins of values... It's their arrogant behaviour to users, their incapability to handle criticism and the fact that they're unable to keep the exchange running.