Deep cross-promotion with Instagram is a key factor in the popularity.
Users of Instagram may sign up for Threads with only one touch and their Instagram login after installing the app from the App Store.
A Threads badge will then display on your Instagram page.
The Threads launch could not be better timed, given the tumult of chaos that continues at Twitter.
Threads is the closest anyone has come to offering a serious Twitter replacement.
Instagram has also promised that Threads will participate in the “fediverse,” although this is not available yet. Soon, Threads will supposedly be compatible with the same ActivityPub protocol that Mastodon uses, so people can follow each other across networks and freely migrate their data, if they want to.