I would argue that users own their clickstream data and are free to give it away. (The question then becomes whether Microsoft makes sufficiently clear exactly

I would argue that users own their clickstream data and are free to give it away. (The question then becomes whether Microsoft makes sufficiently clear exactly which data users are giving to them.) Clickstream data is basically a list of URLs, I don’t think (parts of) such lists should controlled by website owners. I’m not sure, though, whether I have overseen something that would make it useful or fair to give website owners control over clickstream data. I’m honestly open for suggestions. But that’s only part of the problem. Even if everyone were to agree that collecting clickstream data from users with their consent is ok, we still don’t know how those who collect the data are allowed to use it. That’s certainly not an easy question.