Data purchasers do not have access to specific, or person-particular data points. Data purchasers pay for summary insights on a given data set. In the future, Datacoup will give the user ability to disseminate their own data to specific purchasers, should they choose to do so. User freedoms and choice is a bedrock of our platform and ethos.
For even more information on how Datacoup works, please see FAQ entitled: How does Datacoup work?