Don't rely on coinmarketcap for analysis of dex activity.

The fee address shows that millions in kmd and other coins have gone through it.  The fee is 1/777, so in KMD alone around 7.2 million kmd have flowed through the Dex.  The Dex liquidity is still low but it's also in early public beta,  that is just a factor that will increase as the software becomes before refined and more people use it and more implementations of it come live.

Supernet holds many assets besides Dex related ones such as crypto777 which paid out a million in revshare last year,  additionally Supernet holders receive the votes from the kmd held by Supernet.