Just so there's no misunderstandings
Occasionally we test new categories with some exit traffic or other types to see the effects of certain advertising - some times there's left over clicks which will get outsourced to other traffic resellers which end up in those popup chains - Im pretty sure thats where that originated from showing up with LFS as a popup
Not a bad thing, and as far as the popup chains on an exit/sponsor link, its sometimes effective on free sites, but a much better way is with a hub and niche choices to a FPA ring - then if you cant sell the surfer you can trade off to a toplist or a pop chain but try to get as much money for yourself first with friendly links