also
when you manufacter suff you want to sell it in bulk... you can't waste resources sending 1 or 2 cards to 1000 people.. you must put 1000 cards in a box and send each box to 4-5 people
example:
the card creators make the product, the store orders 1000 units of that product, they make the deal,
then the "creators" have enough money to continue manufacter and use it to make more stock and worry about manufacturing fixing stuff, make sure the product is good etc...
while the shops are in charge of handling and sell them to you...
numbers are examples. not real, and probably not accurate.