The only thing they seem to miss from the author's description is: "It has to be decentralized. The database would be hosted on many computers and each new entry would be processed using some sort of consensus algorithm."

But there's no motivation for why this is a expected property of the network

They "work" in the sense that they have a checklist of features that I'm sure function as intended.

But the product/network as a whole is far from "working".