Ok, I think I've got an explanation. But mind that I'm not an Economist, so It's the layman's understanding.

I guess you are referring to DRK volume in exchanges. I didn't even bother to go there check your allegation, but I can quite understand this hypothetical situation when I think about my behaviour towards Darkcoin:

What I mean is that I am one to be blamed for the lack of DRK volume in exchanges. This is so just because ALL the darkcoins I have managed to buy or mine are safe in my wallets/MasterNode, and I have got no intention to send them to any exchange (obviously because I have got no intention to sell any of it).

But I am not the worst devil for causing this lack ov DRK volume in exchanges, because I do try to stimulate some more volume there, by regularly sending all the BTCs I can manage to get, in order to try to BUY more and more DRK... But, unfortunatelly, it seems that most of the Darkcoin holders nowadays are not willing to sell me enough of their DRKs (so I guess that they are also contributing to make this low volume you talk about).

TLDR:If the volume is low IN EXCHANGES is because the Darkcoin holders love their DRKs so much that they don't want to exchange it at all...

I hope I was of any help.