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Threads' New Terms and Conditions Affects the Fediverse
(wedistribute.org)
A community dedicated to fediverse news and discussion.
Fediverse is a portmanteau of "federation" and "universe".
Getting started on Fediverse;
Looking into it, aren't both of these only Mastodon and not part of ActivityPub itself? I can't find details on them outside of Mastodon.
And what prevents the post from getting published to other instances from different sources?
They are mastodon-specific, but most fedi software has a similar feature. Or at least, all of the mainstream microblogging software does, as well as some of the image / video sharing platforms. I'm unsure about Lemmy and Kbin. Here are the equivalent settings for FireFish: