All I know is, Ancestry matched me up with relatives on both my mother’s and father’s side, and even knew the correct relationships. How would it know, unless there’s something to this?
marketing profile constructed about “you” from data used on whitepages.com etc?
Since the internet site know peoples’ families, addresses, phone numbers, and birth certificate data (just from public information), a corporation data punching it into the professional geneology sites doesn’t seem like such a stretch.