Frankfurt.
We're in the last keynote of the Prosumer Revisited conference, by Kerstin Rieder. She begins by giving an overview of existing research on active consumption - on the societal, organisational, and interactive level. There is currently a fundamental change in producer/consumer relationships, towards consumer labour (or towards 'the working customer', the English translation of the title of her book with Günter Voß, Der arbeitende Kunde). Kerstin notes for example that customers do work for McDonald's by collecting their rubbish and separating it into different waste categories; the value of this labour in Germany adds up to several billion Euro per year.