I 'm guessing it 's .
They have to pay for player 's rights if they 're not in the NFL so instead of paying for the rights to 50 different players they just pay for 20 and release 4 of each card .
I 'm guessing it 's because they have to pay for player 's rights if they 're not in the NFL so instead of paying for the rights to 50 different players they just pay for 20 and release 4 of each card .