The monetization structure(s) that will support relays will depend on apps that serve the needs of customers in such a way that those customers are willing to pay for features, analytics, etc, in order to themselves be profitable in their own endeavors. Customers can be artists and content creators and vendors, etc, but customers can also be advertisers and others interested in user data for various reasons. App/client devs need to decide who is their customer base and intentionally build for them, instead of just building whatever willy nilly new feature feels cool to them at any given moment. Some seem to be better at that than others, but all of them who are serious about the future of their apps need to be thinking beyond their own pet projects and features to the needs of their existing and/or potential customers.