https://phys.org/news/2018-05-google-facebook-europe-privacy-law.html

In March, Facebook updated its privacy controls in hopes of making them easier to find and understand. CEO Mark Zuckerberg has said Facebook intends to offer those same controls and settings around the world, even though the GDPR governs only EU users.

But Facebook has been vague about applying other GDPR provisions to non-Europeans. That includes one that lets Europeans object to the processing of personal data, such as for marketing.