https://www.theguardian.com/technology/2018/mar/29/facebook-shuts-down-partner-categories-feature-data-brokers-target-users-privacy

Company to shut down Partner Categories feature to ‘improve people’s privacy’ but analysts question potential impact of change

Facebook is shutting down a feature that allowed “data brokers” such as Experian and Oracle to use their own reams of consumer information to target social network users, the company has announced.