- Fleets are 'not public' - You can see them on someone's profile if you don't follow them, but can't retweet (re-fleet?) them.
- They cannot recelive likes or replies either.
- Testing is going on in Brazil
- Twitter is still testing allowing tweets to be 'public' or 'followers' only, but it has not been pushed to public testing.
- You will be able to post videos. Some special users can have videos up to 10m in length.
- You can reply to them privately.