It has been postulated that the DEM hot and exchange wallets are indeed linked to the mining pool outputs... you can trace it on the blockchain. At one point, DEM died here and someone put it back online.
If I try and mine DEM on stratum+tcp://stratum.coinex.pw:9031 it just comes up as dead.
Same goes for stratum+tcp://stratum.coinex.pw:9944 the switch port. As far as I can tell it's not possible to mine atm on coinex, so the wallets are not getting topped up.