Overall, the logic is the same - short posts, likes and repays. The main plus is that users can use their Instagram network to find people to follow. That is, your Instagram subscriptions and followers go to Threads automatically, making the feed immediately interesting.
The app has just launched, but it doesn't yet have features from Twitter like long videos, direct messages, and live audio rooms.
There are currently no paid tiers or ads in the app. However, your Instagram verification mark remains - even if you've paid for Meta Verified.