The data-collection business model fueling Facebook and Google represents a threat to human rights around the world, Amnesty International said in a report Wednesday.

The organization argued that offering people free online services and then using information about them to target money-making ads imperils a gamut of rights including freedom of opinion and expression.

"Despite the real value of the services they provide, Google and Facebook's platforms come at a systemic cost," Amnesty said in its report, "Surveillance Giants."

"The companies' surveillance-based business model forces people to make a Faustian bargain, whereby they are only able to enjoy their human rights online by submitting to a system predicated on human rights abuse."