Right. I think some way of managing a legal entity npub, very different to a private and personal npub, would be the way most people would use this sort of an application. The point is that the information about listings is gatekept, but it doesn't have to be. Local parties (local gov't, investors, companies, and private owners) could broadcast information in a verifiable manner to a set of local relays for marketplace records, and those records being not only public but very available could expedite and make lower cost certain sales, especially real estate.

It doesn't just have to be Twitter replacements and media sharing, but real, high ticket commerce.