Weizenbaum Institute：2020年差距和机会：新欧盟消费者保护法下‘数据付费消费者’的初步保护报告（英文版）

Not all the ostensibly free contents, services and products offered in digital form over the internet are an expression of sheer gratuitousness. Very often, traders monetise data and contents that are being provided and generated over the course of using the content or service instead of charging money for that use. For instance, Google, with its extremely popular search engine and many useful web applications, does not charge its users a cent for taking advantage of its high-quality products