Facebook explicitly has my name, my "second" birthday (I love all my birthdays equally, especially the ones I give to marketing sites) and a special email address I have literally created only to give to Facebook for my account. The rest of my account info is deliberately empty and I've deliberately locked down as much privacy settings as I can, don't use the site from my phone (Honestly I barely use the site at all) and have opted out of everything I can.
Advertisers are still showing up (one of them is a liquor store even though I'm a teetotaler and I have selected not to be shown alcohol ads, but what can you do?)
either way, something rather fishy is going on.
Unless they're Facebook "partners," which means more access, but nobody really knows how far that goes because it's all private.