How exactly Google Play works for monetised apps from legal point of view? Are they ones who provide paid licence to an app to consumer (reseller), or are they

How exactly Google Play works for monetised apps from legal point of view? Are they ones who provide paid licence to an app to consumer (reseller), or are they just a marketplace intermediate, where the transaction is between app provider and consumer? But in both cases, seems to me that at least for monetised apps, providing identifying information is important for consumer protection and therefore they have legitimate reason to do this.