Consumer activism has been reshaped as it has moved increasingly into the digital realm, and yet relevant theorisations have been slow to emerge. This paper presents an innovative approach to examining digital consumer politics through key scholarship in digital activism and the digital economy. Through a discussion of three case studies, we analyse digitally-mediated agency, and the transformation of consumption meanings and practices in the digital economy. We argue that digital consumer activism offers both new forms of campaigning and presents familiar problems. Our case studies demonstrate the complexity of engendering agency when consumer activism enters the digital realm. Equally, the case studies illustrate contradictions in the way in which consumer politics contests the capitalist economy offline, but leaves it substantially uncontested online because of a reliance on digital platforms dedicated to private profit.