Really I'm very upset with this exchange... They have one of the most expensive withdrawal fees I've ever see... I saw this kind of abusive fees in other exchanges like yobit but I tought HITBTC will be a little more serious due to the fact its great volume... They don't need to charge those abusive fees... Really... If they doesn't change their politics I think I will withdraw all my fund from there (despite the fact they will thieve me in every withdrawal I'll make) 
I thought there's a lot of good exchanges we can use and it is really good to choose the exchange with a low exchange fees. But base on you experience on hitbtc it is terrifying if it has a most expensive withdrawal fees. I think it is better to choose a lower transaction fees in order to lessen the cost of your crypto exchange transaction.