Twitter has sharply escalated its battle against fake and suspicious accounts, suspending more than 1 million a day in recent months, a major shift to lessen the flow of disinformation on the platform, according to data obtained by The Washington Post.

The rate of account suspensions, which Twitter confirmed to The Post, has more than doubled since October, when the company revealed under congressional pressure how Russia used fake accounts to interfere in the U.S. presidential election. Twitter suspended more than 70 million accounts in May and June, and the pace has continued in July, according to the data.
https://www.washingtonpost.com/technology/2018/07/06/twitter-is-sweeping-out-fake-accounts-like-never-before-putting-user-growth-risk/

Also see:

Twitter suspends over 70 million accounts in two months – Washington Post
Twitter Inc suspended more than one million accounts a day in recent months to reduce the flow of misinformation on the platform, the Washington Post reported.
https://in.reuters.com/article/twitter-inc-suspensions/twitter-suspends-over-70-million-accounts-in-two-months-washington-post-idINKBN1JX01X
https://uk.reuters.com/article/us-twitter-inc-suspensions/twitter-suspends-over-70-million-accounts-in-two-months-washington-post-idUKKBN1JW2XN