What's twitter!? Do you mean X? 😉

Impersonating celebrities? On the Internet? Who would do such a thing?

On general, yes, however threads uses your Instagram username. I think it's just initial excitement to try something new and people getting on the anti - X / twitter / Elon train and then realising that the network effect has way more pull

Not defending meta, but that wouldn’t add up with the amount of activity that immediately followed

I believe Instagram usernames are reserved on Threads to ensure people can keep the same handle on both networks, but the users aren’t automatically signed up with a profile.

even if that were true - it wouldn't make sense. That would would a) create a huge disparity between signups and DAU b) they did make the signup process very frictionless which would explain the signups better and c) I believe it threads signups were in the millions whereas Instagram has over 1B accounts

it seemed like turning on an additional function for Instagram to me. it's still bloated with the same junk as you'd expect.