one question :
is it hard for exchange to set up 2nd gen coin system like NFD & NXT in their exchange?
because NFD has different wallet compare to another coin
only few exchange have listed NXT anyway
There are initial development costs. An exchange have to calculate whether future trade volume will pay this costs. A second way is to pay their development costs to get listed.
It should be more and more easier for NXT and forks of NXT to get listed, because more and more people are interested in this kind of 2.0 coin.