Which it absolutely isn't, since they're reserving themselves the right to use it for advertising purposes. If it was properly anonymised it would be completely useless for such purposes.

That is likely a fair assumption, but an assumption nonetheless. There exists marketing data which does not identify individuals.

> There exists marketing data which does not identify individuals.

As these datasets grow (and they only grow), it becomes trivial to tie anonymized profiles to a specific person. They leave off names and it's expected that the final consumer of the data do the "last mile" work of tying it to the name. The easy part.

it's actually pretty difficult to anonymize data and not have it be able to de-anonymized, at any rate the question regarded privacy rights and if things are anonymized that's not what the question would be then.