Why would you assume Don Johnson would correctly report his use or non-use of rebates in that particular AC sequence in an interview? The correct people to ask would be (1) the casinos, who are not going to tell you how stupid they were, and (2) the author, who has much more information than appeared in that story. If I were Johnson, who makes Billy Walters look shy, I would never publicly admit to taking a rebate. There is no advantage to it.
Why would you assume he had not used rebates previously in the same AC context to set up this sequence? I'm going to go out on a limb, and say he didn't just show up out of the blue without greasing the wheels.
Why do you assume he hasn't done and didn't attempt other versions of this all over the world? He did. This AC sequence was just his biggest splash with the most egregious casino mismanagement.