How ISIS Games Twitter

The closing paragraph:

Media attention has focused, not unreasonably, on ISIS’s use of social media to spread pictures of graphic violence, attract new fighters, and incite lone wolves. But it’s important to recognize that these activities are supported by sophisticated online machinery. ISIS does have legitimate support online—but less than it might seem. And it owes a lot of that support to a calculated campaign that would put American social-media-marketing gurus to shame.