Platform urbanism is the latest expression of the Internet industry’s relentless drive to capture the digital culture of participation for the purposes of capital accumulation. Already in the early 2000s, after the dot.com stock market crash of 2001, the organic intellectuals of Silicon Valley were spreading the message that harnessing users’ participation was an essential component of any successful business strategy in a new economic environment shaped by an abundance of information and a scarcity of attention.[1] The movement from virtual communities to the social web, and then from the web 2.0 to social media and platform capitalism, has thus been a process of progressively consolidating a model that combines an extractive approach to monetisation based on data mining with a governmental approach based on algorithmic regulation to managing the behaviour of networked populations.[2]