1) Twitter routinely, habitually and persistently unfollows us from people that we follow.
Make sure on a weekly basis, that you didn't get unfollowed from accounts that interest you.
You may need to refollow several times a week.
See above for the remedy.
If growing your following is one of your goals, then follow people back who tweet about things you're interested in.
(Follow the maximum number of accounts allowed every day.)
There's no way to get your account unshadowbanned.
The way to defeat shadowbanning is to retweet accounts that post relevant or helpful content.
The more we all retweet, the less effective shadowbanning is.
It's all about Teamwork
(Thanks for following.)