https://www.vox.com/2018/7/11/17561610/trump-fake-twitter-followers-bot-accounts

If you see a decline in your Twitter following over the next few days, you can blame, well, Twitter — and the fact that those accounts probably weren’t real in the first place.

Starting this week, Twitter will begin removing tens of millions of suspicious and fake accounts from its platform’s follower counts in an effort to clean up the site. Specifically, it will remove locked accounts — suspicious accounts it puts a temporary lock on until owners validate them and change their passwords. According to the New York Times, this change will result in users collectively losing tens of millions of followers. It will reduce the total combined Twitter follower count by an estimated 6 percent, a Twitter spokesperson said in an email.