Adam Mosseri:
Second, threads posted by me and a few members of the Threads team will be available on other fediverse platforms like Mastodon starting this week. This test is a small but meaningful step towards making Threads interoperable with other apps using ActivityPub — we’re committed to doing this so that people can find community and engage with the content most relevant to them, no matter what app they use.
I think this is inevitable, in part because serving is expensive, and now that we might get significant spammer activity, complicated. Carrying the analogy on, though, I have a Proton account and I can give it out in real life just the way I would a Gmail account. There is no such possibility with Twitter. They could try and put up a hard wall once they have enough buy-in, but that didn’t work so well for Yahoo mail, and hopefully it wouldn’t for Threads.
So yeah, I expect I’ll be on a little instance somewhere, and I’ll still be able to participate in the equivalent of the Obama AMA hosted on one of the big ones.