@caseynewton It's a new Instagram feature that got a ton of hype, and around 7% of the IG installed base decided to try it. Because of IG's scale, 7% as a raw number is impressive.
However, since no Threads users can leave without also nuking their IG accounts, I will become increasingly skeptical of Threads "user numbers" the more time passes.
Remember how pre-IPO Facebook counted as "active users" anyone whose mobile app was polling FB in background? Does Threads do that?