They don't sell it, but do the partners that they share it with? I don't see why it matters if they get paid or not, they give out the info.
I'm generally not a nutter about these things, and my gut told me not to sign up for the new GFE when it required login, but I did it anyway. Not happy, but I'm sure I have info out there all over the place already anyway. This makes me even more determined to get AMD next go around though... I'm usually a best bang-for-buck type guy, but this may be a turning point.
It will probably be for targetted marketing and market research.