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.
The wrong kind of users though… The people on Facebook likely to use Threads, are the ones who I’d hate to federate with. Discussions would quickly change to low effort karma grabs and inside jokes.
You’re also likely to get a lot more people doing stealth/viral marketing, more bots, etc
That’s why I use Beehaw honestly… It actually feels like I’m talking to people