This is completely unacceptable behaviour, I was lucky enough to withdraw my funds just few hours before crash.
So I have no reason to post negatives but it is totally reasonable for all those who where "locked" to leave some appropriate trust on their account. Obviously avoid aggressive words/treats, be informative.
I think it was a little to much for such small exchange, huge traffic plus volume... maybe they somehow run out of funds? (if even possible) Hope that this will be a good lesson for us all and for owners of Merca.
Don't rush next time.