The largest of the platform and social media companies, Google, Apple, Facebook, Amazon, and even second order companies such as Twitter, Snapchat and emerging messaging app companies, have become extremely powerful in terms of controlling who publishes what to whom, and how that publication is monetized. There is a far greater concentration of power in this respect than there ever has been in the past. Networks favor economies of scale, so our careful curation of plurality in media markets such as the UK, disappears at a stroke, and the market dynamics and anti-trust laws the Americans rely on to sort out such anomalies are failing.
Source: Facebook is eating the world – Columbia Journalism Review