I’ve been following it and replying to many questions. I'm not claiming to know everything, but here's what I've learnt, all in one Thread. It might help those feeling attacked.
...
1/5
A. If you can’t post/repost/ it’s probably twitter doing admin, it’ll last a few hours. You might have been followed by a lot of bots.
B. If you have lost all followers (so no one sees you), it’s a soft ban restriction. They are still there but hiding. Causes seem to be:
2/5
3/5
C. If you just missing a significant number of followers that will be a mix of bots that have been removed and people in situation B above who are restricted but they will reappear...
4/5
shadowban.eu
end 5/5
Check:
Settings
>Private = only interact with people you approve
>Notifications>Advanced: only notifies of interactions with others who have more than a few followers/verified their email/phone. Its safest but very limiting if you havent too many followers when turning it on.