> what seems awkward, missing, to me is that all these virality systems are push model. each would be social network has to bootstrap, and it does it by making

> what seems awkward, missing, to me is that all these virality systems are push model. each would be social network has to bootstrap, and it does it by making new users push a bunch of invites out to their friends. > where is the pull model? where can I go see my friend Cable's activity, see what networks he is most social on these days? Instagram posts to Twitter are mentioned in the article, but that's such a special purpose form, such a one off, made in part possible by the very general share-whatever nature of twitter. Clubhouse actually is both push and pull. Yes, you can send invites to friends to get them onto the app, but having your contacts also lets them connect you to those already there when you first log on. Of course this isn't the open pull model you're talking about, where I can discover new things my friend is doing, or find out where he is most active. But using the phone number as an identifier for social graphs is kind of a hack around the non-existence of such a thing.