From my point of view these cards are already a pain. Either I print off the entire season (defeating any convenience of the new technology); or I carry two more cards in my wallet, give one to whomever I am taking to the game, and remember to get it back at the end of the game; or I scan both cards at the door and hope my guest remembers where the seats are, doesn't need re-entry, etc.
No need to mention the "low-endness" of PDF copies.
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