I see they offer some services such as masternodes, node services, and gateway nodes. A little confusing if they are POWs but they are also used for staking like POWs. I think they can be hybirds. The advantages they offer from owning the market I think you can get Etho coins with staking, it's a kind of POS with greater capital you will also get bigger daily coins. Please check directly https://ethoprotocol.com/