"people can put as much detail on there as they wish"
There are already marketing-related web sites that offer discounts for stuff if you participate according to their rules, and so it's not a new idea. A lot of people would complete marketing surveys and allow their purchases to be tracked in order to get the discounts. But it should ALWAYS be voluntary, above board, and in compliance with laws SUCH AS the GDPR.
And if they're being sneaky about it, they have something to hide.
Biting the hand that feeds IT
