The "decoy cards" were a joke. Only half the packs in a box would have a decoy card in them, so this just helped the pack searchers pinpoint the pack with the game jersey/bat card in it.
I worked in retail for years and saw my share of pack searchers & all their techniques.
Some were very sophisticated too. Once saw a guy at another retailer with a homemade miniature hand-held metal detector. Of course I had to ask. The metal detector was to find autographs. Factory autographed cards have that little foil certification sticker or a foil sticker where the player signs & that was all it took.
Jantz
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