Here is what the _current_ content says:
One of the interesting dichotomies with compensation data
is that many users want this information, but don’t want to
have their individual data exposed or connected back to them.
Salary information is personal to each of our members. With
this in mind, and consistent with our Members First organizational
philosophy, one of the first goals we established when we set out
to embark on this project was to provide powerful salary insights
in aggregate without risking an individual’s private information.
In the end, we built a salary collection system to provide the
strongest protections for the anonymity of all of our members—no
easy task. Parts of our approach are detailed later in this article.
Because we proactively separate a member’s submission data from their
Member ID when compensation data is submitted, it enables us to
secure the system in such a way that we cannot even support the
ability for a member to update their previously submitted salary
information - they have to resubmit. Furthermore, our system provides
protection not just from hackers out in the wild, but also provides
access control against unauthorized use by internal users.
If I am reading this correctly, what they seem to say is that as implemented currently, they don't have the ability to track a person's salary information to their profile and hence won't be able to sell that information.