You make some very interesting points. G+ failed to addict us with its doomscrolling, so bad at generating ad revenue, but that doesn’t mean what they were doing was without merit.

Question: were G+ lists transitive in any way? I believe that WoT needs to be transitive — not always, but probably transitive by default with the ability to turn transitivity off for WoT to get off the ground. 

If I trust 3 people to curate content on wikifreedia, and those 3 people each trust (let’s say on average) 3 more ad infinitum, then by the principle of “6 degrees of separation,” onboarding a new user who benefits from a WoT that spans the entire world is simple, quick, and easy for the user.

If someone 2 hops away from me trusts Alice to curate wikifreedia articles on electronics, and Alice trusts Bob to curate wikifreedia articles on smartphones (a child category under electronics), and so on to progressively more fine-grained categories, then before you know it my wikifreedia extended WoT not only spans the entire world; it will have also selected a small handful of experts for every niche topic in existence, and all I had to do was trust one user to inherit that user’s entire trust network.