Escort on Facebook Feed

[mondave]

So I'm scrolling through my Facebook feed and on the "people you may know" section theres an escort I have met through this site a good few times. Seems like a genuine account with her real name and personal pics etc. but we have no common Facebook friends and she's not Irish either (which I am)

Anyone any info on how this happens? Does FB drill down into sites you visit and be able to single out one escort? even if it did that her personal FB account would hardly be linked to EI??