@johnonolan Great news!

>There are multiple ways of supporting gated access to content in ActivityPub, and we're going to do our best to create a seamless experience both for publishers and for readers.

I've built an ActivityPub powered content subscription service called Mitra. Right now it uses direct messages to distribute subscriber-only posts. This method is compatible with most Fediverse micro-blogging services, but doesn't scale, so I'm doing research on federated private groups. I also wrote (and implemented) a specification for federated payments: https://codeberg.org/fediverse/fep/src/branch/main/fep/0837/fep-0837.md

Looking forward to working together on standards for subscription services