Tux exchange delisted BCY because people were making lot of small deposits and it costed more for them to pay transaction fees than they got from trading fees. Well, it was small exchange anyway, but now we have only Zaif where people are trading BCY against JPY, besides Counterpartys decentralized exchange with almost none volyme at the moment.
I dont know if users should collect funds for listing, I cant understand why Bitcrystals team cant get their coin listed somewhere when they are well known in industry.
That sounds dumb for Tux Exchange . They should just increase their withdrawal fees. You dont have any fees when you are receiving coins. Sender pay fee. If withdrawal fees were to small they should increased them. I believe you are wrong and reason should simply be that coin was not traded enough. But is silly since exchange is small so any volume is good for them.
That is what Tux exchange dev said on their chat for reason, besides talking something about possible "legal problems" or something like that what I did not figured out what was he talking about.
I dont know, maybe they have to redeposit user deposits to their main wallets or something.