This Article considers the role of ideas in shaping law and policy processes, serving to facilitate certain actions or approaches while curtailing others. Using the development of the EU’s governance approach to online service providers and platforms, this Article demonstrates how ordoliberalism as a set of beliefs regarding the regulation of market activity through law have shaped the understanding of appropriate measures for combating hybrid threats such as disinformation. Highlighting the origins of the E-Commerce Directive and the influence of ordoliberalism in the application of a regulated self-regulation model, the Article explores how ordoliberal philosophical ideas have influenced programme and policy level ideas concerning EU cyberspace governance as it relates to online platform activities. Even where there has been discursive change regarding the role of online platforms in contributing to an environment of insecurity, there has nevertheless been ideational continuity in the approach to their regulation, dictating the legal response in the Digital Services Act.