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.
Still, if people don’t interact with Threads content, that effectively keeps them separate.
Also, come to think of it, what’s keeping companies from “vacuuming” everyone’s data without actually having a public instance that has users interacting with posts on other instances? Example: Instance A exists. What’s stopping a company that runs Instance B, which doesn’t have any active users on it, from taking all the available data from Instance A? Genuine question, by the way. I haven’t exactly kept up with the technical workings of Lemmy very well.