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Battling Fake Accounts, Twitter to Slash Millions of Followers - The New York Times

In recent months, Twitter has taken a number of steps to improve what Ms. Harvey and other company officials call healthy conversation on the platform, including rooting out fake and automated accounts. Last month, Twitter announced that as of May, its systems were locking almost 10 million suspicious accounts per week, far more than last year, and removing more for violating anti-spam policies.