I'm not OP but I worked on something similar that also never made it to production. In our case we were going to use fingerprinting to prevent sweepstakes frau

I'm not OP but I worked on something similar that also never made it to production. In our case we were going to use fingerprinting to prevent sweepstakes fraud. People would enter multiple times despite the rules specifying you can only enter once. A lot of people were not sophisticated so much of it was easy to detect (eg same contact info but different email). Some were less easy to detect so I figured fingerprinting could help. I never finished it so it was never tested in a live environment. We wouldn't have shared the info with anyone except in the case of fraud so I don't see it being a problem.