Large digital platforms have been in the doghouse of antitrust decision-makers worldwide in recent years. Antitrust regulators agree, urgent intervention is needed. Interestingly, it is the plight of victimized suppliers--of merchants, app developers, publishers, platform labourers, and the like, who are upstream in the value chain--that has topped the policy agenda, prompting scrutiny of an almost unprecedented intensity. Amid such anxieties, emAntitrust and Upstream Platform Power Playsem asks a somewhat provocative question Are upstream platform power plays really 'competition problems', and ones for antitrust, at that pThe apparently obvious answer--'yes'--is deceptively simple for a number of reasons. Firstly, it contradicts contemporary antitrust's single-minded focus on consumers, which has all but erased supplier exploitation in the brick-and-mortar economy from the policy's radar. Secondly, the wider antitrust community remains bitterly divided when it comes to judging platfor