There are much more powerful groups operating on Bittrex.
Watch out with Bittrex these days. They can just lock your account (verified or not) or limit withdrawal to 0 without any notification. There are people with over 3 months of waiting for their support ticket to be answered.
if Nocks and Guldentrader can add USD trading option and for US buyers to deposit directly on their exchange I personally wouldn't mind if Gulden was removed from all btc/nlg exchanges, if people are worried that a group is holding the coin back on bittrex then this might solve the problem?