I'm not obliged to use Facebook. If people want to sell their brains to Mark Zuckerberg, that's their right, but it's hardly a dictatorship in any meaningful use of the word. When we're all forced at gunpoint to use Facebook, then the article may have a point.
Sunde is right. As more people migrate to mobile where data caps are common and zero-rated services are becoming more prevalent (courtesy of Facebook's Internet.org/Free Basics initiative) more people will find themselves locked in to Facebook.