Facebook has built a platform that's much more accurate and comprehensive than anything experian has, because experian isn't in the business of selling your political beliefs and sexual orientation and a hundred other demographics to marketers.

You can file a FOIA request with Facebook to see what they have on you. Other people have, and have gotten their dossiers. Have you had a phone number or mailing address in the past 10 years? If so, they've gotcha covered.