But equally important is corporate power. There is no reason to assume that a corporation, unless specifically checked from doing so, won't use the personal data it collects or buys in its own interests and against an individual's interests. Many forms of personal data are the source of validly competing interests: when individuals insure against risks to themselves, the interests of insurers and insured are often, quite legitimately, opposed.

Nick Couldry & Ulises A. Mejias, The Costs of Connection, loc. 497