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Threads already has over 95 million posts, 30 million signups
(www.theverge.com)
This is a most excellent place for technology news and articles.
Unfortunately that is the power of marketing, an already established user base and a low barrier of entry. People who have Instagram accounts already have a Threads account, and people who have a Facebook account already have an Instagram account. It's much easier to get them to try than it is to get people to sign up for any Fediverse instance.
I just hope that once it opens to the Fediverse, people who are already there can feel more comfortable to make the leap and drop Meta. Because Meta is not going to let the users drive the experience anyway.