All you have to do is shop through Burger King’s website.
Burger King
Credit: Burger King

How can Burger King possibly afford to give Black Friday shoppers free Whoppers? They have someone else pay for it, of course.

BK’s new website,, features online banner ads from other brands. Whenever someone clicks on an ad and buys something, that company pays Burger King's brand some affiliate money.

WATCH: How to Make 3 Copycat Fast Food Sauces

That money, in turn, is given back to the shopper in the form of free Whoppers. You can earn up to three sandwiches by using the website.

Here’s how it works:

Click on any of more than 1,000 banner ads. Brands include Walmart, Target, Macy’s, and Best Buy, to name a few.

Make a purchase.

Wait for your vouchers to arrive in the mail. They’ll be sent as soon as the promotion ends.

All that’s left to do is enjoy your free burgers! The promotion is live now through Cyber Monday, November 26.