From the section about proposed ActivityPub integrations:<p>>If you have a public profile on Threads, this means your posts would be accessible from other apps, allowing you to reach new people with no added effort. If you have a private profile, you’d be able to approve users on Threads who want to follow you and interact with your content, similar to your experience on Instagram.<p>That reads like they'll be supporting ActivityPub for public profiles, but private profiles will be Threads-only. Does ActivityPub have anything in the spec for private sharing? Is there anyone working on that? (I'd love to get in touch!)