The Diversity of the Services provided by Online Platforms and the Specificity of the Counter-performance of these ServicesA double Challenge for European and National Contract Law - Journal of European Consumer and Market Law View The Diversity of the Services provided by Online Platforms and the Specificity of the Counter-performance of these ServicesA double Challenge for European and National Contract Law by - Journal of European Consumer and Market Law The Diversity of the Services provided by Online Platforms and the Specificity of the Counter-performance of these ServicesA double Challenge for European and National Contract Law 5 1 Journal of European Consumer and Market Law