This is not true of unroll. From the blog, "I can't stress enough the importance of your privacy. We never, ever release personal data about you. All data is co

This is not true of unroll. From the blog, "I can't stress enough the importance of your privacy. We never, ever release personal data about you. All data is completely anonymous and related to purchases only. To get a sense of what this data looks like and how it is used, check out the Slice Intelligence blog.". So they are the same as Google. At the end of the day, nobody outside the company truly knows if either of them sell identifiable information.