I get how edge sorting (the name of the technique used) works. It's been a known advantage play move for decades and explanation of this exploit has been in print both in advantage play (Abram's casino tactics book) and casino game protection literature(Steve Forte's book). Shame on paid casino managers/executives for not being aware of it.
It's not illegal to use marked cards if neither you nor a compatriot marked the cards. Look up the case law if you don't believe me. If someone accidentally bends a corner of a card, you don't have to pretend not to notice; you can legally use that info as long as you didn't do it yourself and the guy didn't do it for your benefit.
I've made the point in other posts, but it's the casino's responsibility to protect their games. The casino provided the cards, the casino trained dealer rotated the cards thus allowing edge sorting to be used, the pit personnel and surveillance observed this, and had no problems with it. Ivy and his partner never touched the cards and didn't alter the cards in any way. This was a social engineering attack on a casino's greed and incompetence, but it was not cheating.
This was a horrible decision by the judge.