This seems like a good time to mention that FreeFollow.org is looking for private beta testers for our app that combines the pub/sub model and slick UX of social media (posts, comments, following) with the economic model of webhosting (pay to host a group, not to participate in them) and the E2EE design of 1Password (but using OPAQUE which is actually the protocol used by WhatsApp, rather than SRP).
Our initial use case -- why we're building this -- is parents who are currently using text groups in Apple Messages or WhatsApp to share photos/videos of their kiddos with friends/family and want something less interruptive and more casual, but for whom social media is so toxic and untrusted as to be a non-starter.