Well they've proven, even in the midst of the scandal that they can spot a LOT of altered cards. That's why the key is to establish the threshold percentage. Again this was inspired by submissions where they rejected a ton of the cards, yet graded the remainder. To me if you then flag the rest of the submission for closer examination you are still rewarding the card doctors. Once you hit that percentage, BAM your cards are returned ungraded and you are banned. No need to waste more time on them, you are a bad actor and your entire submission is suspect.
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