> ActivityPub seems like an interesting protocol waiting for a killer app You may well be right. If someone builds a new and innovative social network, it wil

> ActivityPub seems like an interesting protocol waiting for a killer app You may well be right. If someone builds a new and innovative social network, it will start with 0 users and probably won't be able to compete with existing networks, due to network effects. But if someone builds a new and innovative social network using ActivityPub, it can piggyback on all ActivityPub's existing users, so network effects help it (and help existing ActivityPub systems). ActivityPub means that innovation in the social networking space can now succeed, and is thus a game changer.