Digital markets and platforms are increasingly important in commercial life, and the way contracts are formed between users and platforms in multi-sided markets raise many important legal issues. This article interrogates the nature of multi-sided market contracting, and raises questions regarding the binding of users to standard terms, especially extensive limitations of liability. Platforms also govern the terms between supply and demand sides, many of which are standardised and not necessarily bargained for by users on the platform. This gatekeeper role should entail a heightened level of responsibility.