EDIT: here's yet another free code: VC9AVLL312KNF15
85 free Pampers Rewards points is a thing. After you login, visit this link to automatically gain 20 points before entering codes CM8HFD7EW38BU15 & PAMP8C91ACNEL16 to round out your collection. Then you can try and decipher what lead you start collecting Pampers points in the first place. I would have went with stamps, baseball cards, or old license plates.