I am by no means a reasonably sound person... But now I am obsessed with the cards, even though I don't use them much I intend to scan them all in eventually
I have all of series one (almost, couple still en route to my house) And I have scanned a total of 3 cards.... yes.. 3. And the only other cards I scan are to gift people the 7-11 DLC. So you definitely don't need the cards
I am so obsessed with these ridiculous cards, that even though I have them all or am about to have them all... I still catch myself looking for them at the store when I DON'T need them! I can't get away. I understand your obsession lol.