How Devumi uses its 3.5M+ automated Twitter accounts, sometimes based on stolen social identities, to sell followers and retweets to 200K+ customers (New York Times)

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New York Times:
How Devumi uses its 3.5M+ automated Twitter accounts, sometimes based on stolen social identities, to sell followers and retweets to 200K+ customers  —  Everyone wants to be popular online.  —  Some even pay for it.  —  Inside social media's black market.