They must have a very creative definition of "active user" because Zuckerberg gets 15-20k likes on his posts while I can scroll down X and find several posts a few hours old from random gimmick accounts with many times more. Taking that at face value to call Threads "the leader in its category" is comical.
It actually shows half of the post followed by …, making you think that by clicking it you’ll see the rest. But then you get taken to the App Store to download Threads.
Likewise, I wouldn't be shocked if I'm counted as an daily active Instagram user, despite not having an account or using it directly. The "shorts" are embedded in FB and occasionally interesting.
... Why would you expect Zuckerberg to get more likes than "random gimmick accounts", tho? Those, rather that rather boring billionaires, have traditionally been the major driver of engagement on Twitter, too.