unless you are hiding something that you are afraid to give you identity to the site.
Sometimes it doesn't work like that, even if you do not hide something illegal or not. That's still your privacy and it can't be bought by just xxxxx digits of money if you really care your privacy especially in the internet, there are lots of identity theft incidents happen every time. Even the known reputed websites (Ledger) after it got breached it ends up exposing their customer's data and that's really bad. And that's the cons and risks everytime you use such websites that ask personal info.
I understand that risk, but I'm willing to take the risk to claim $5,000, it's huge money and besides, I would not gamble on the site that I don't trust, they have also their reputation to take care of, so they need to take care of our information if they don't want their business to get destroyed.