If you use the same VPN every time then it would still show you the recommendations. It is also based of location and your current friends list to suggest people. Take off that little foil anti-mindcontrol hat.
That I've had no contact with them for like...ten? years and suddenly I see their name. They are not at my school and we have no friends in common.
Or how I've worked only in-person and through email with people on a group project and suddenly the whole damn team is showing up in suggested friends.
Your job location could do that and Facebook doesn't really care about whether you know them. How many people does it recommend that you don't know compared to those that you do know?
Or how I've worked only in-person and through email with people on a group project and suddenly the whole damn team is showing up in suggested friends.