Threads has ~100 million monthly active users according to Zuck, while Musk claims ~550 million. So if you believe that it's fair to say that "people actually

Threads has ~100 million monthly active users according to Zuck, while Musk claims ~550 million. So if you believe that it's fair to say that "people actually use Mastodon" (which has 1.5 million MAUs), then yes — people actually use Threads.