Meta's Threads has had its daily users down 20% since Saturday and user time spent on the platform is down 50% ~ CNBC

I did check it out. It's just rando thoughts from randos.

What would be interesting is to see how these stats compare to comparable services after their releases

This is where it gets tricky though, as you'd have to find services that have used existing accounts to ease the adoption of the new service, otherwise I think the comparisons wouldn't provide much insight.