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 the reason why meta wants to federate is this:
I don’t think they’re doing it to “get more data” or to “take over the fediverse”. There’s nothing worth taking over for them currently and since most people don’t care about the fediverse I don’t see it growing much either. Although I’d certainly like it if that were the case.
They can probably get the data already, it’s all openly available. Federating it’s basically all upside and no downside for them, but it’s not exactly the biggest priority to implement it, it‘s going to take some time.
I’m not saying it might not have a negative effect or that they care a lot for what’s currently there. They’ll certainly want to monetize threads sooner or later.