The researchers, who can make thousands of dollars for reporting just one security hole on the social-networking site, can use the card to make purchases, just like a credit card, or create a PIN and take money out of an ATM. As the researchers find more bugs, Facebook can add more money to the account.

Facebook wanted to do something special for the people who are helping the company shore up its software and keep hackers and malware out.

Nifty.