Lets break this down fundamentally.
We are grown men and women collecting little pieces of cardboard with ink on both sides, sometimes they have stickers, some times they have extra ink and sometimes imbedded pieces of clothing! These pieces of cardboard depict sport heroes, entertainment or historical figures or joe nobodies!
They have intrinsic value based on the person depicted, whether or not there is handwritten ink, a more colorful piece of clothing or gold leaf sequential numbering.
All I know is I have some great bonfire material or house building should I ever need to stay warm in my olden days! 
