Later in the article: "Bots and trolls are most effective, experts say, when they find ways to interact online with actual people — and especially those with large followings." Also see Twitter Was Warned Repeatedly About This Fake Account Run By A Russian Troll Farm And Refused To Take It Down (BuzzFeed)
"Russian operatives used a fake Twitter account that claimed to speak for Tennessee Republicans to persuade American politicians, celebrities and journalists to share select content with their own massive lists of followers, two people familiar with the matter said.Michael Flynn, Nicki Minaj shared content from this Tennessee GOP account. But it wasn’t real. It was Russian. - The Washington Post
The list of prominent people who tweeted out links from the account, @Ten_GOP, which Twitter shut down in August, includes political figures such as Michael Flynn and Roger Stone, celebrities such as Nicki Minaj and James Woods, and media personalities such as Ann Coulter and Chris Hayes."