~snip~
In a normal situation I believe asking for compensation would be out of question but if money is held without a proper explanation and without proper communication, I don't think it's out of question. Especially when a bonus was OFFERED by the site representative but never actually given.
He can say all he wants about a missed chance of selling, he used the currency BTC and got paid in the currency BTC that the price goes up and down is not pd's problem. And the bonus is to compensate for the days trouble and should be paid indeed.