Domino's will be paying 0.5% of the order value every time a friend or fan clicks on the widget to order from the pizza company.
Dan Clays of digital agency BLM Quantum, which launched the tool for Domino's, said it was an extension of affiliate marketing, in which a third party is rewarded for advertising on behalf of a firm.
"Brands benefit by aligning with sites run by fans who are more likely to drive a sale, while site owners can generate revenues from their Facebook page or blog," Clay said.
The social networkers interested in earning the advertising cash will need to download and sign up to a secure dashboard which will track the sales generated through their web page. Automatic payment will be given at a yet to be decided target amount.
"If you've got a massively popular blog or social network page, there's no limit to how much you could earn," a spokesperson for BLM Quantum told Sky News
The agency said security will be taken seriously, and the widget will not take any information from the user's social network page, but just what is provided in the sign-up process by the user.
Domino's Pizza will be running an online advertising campaign along with the introduction of the tool, which the BLM Quantum claims is the "world's first" of its type.
"A number of other companies are looking at this - it is set to be a massively popular marketing technique in future," the agency said. "Brands are all looking to tap into the power of social media."