So by wikipedia definition then, printing plates found in a card series (which have become pretty common nowadays), are technically 'Artist's Proof'.
But they don't go by that name, obviously.
Makes you wonder what card companies one day will actually call a card that IS - sensibly and literally - an 'artist's proof'?!?
A 'Pixi-Puzzle'? A 'Scratch n Sniff'? A 'Grande Skinny Vanilla Latte' LOL Or any other term that doesn't mean anything close to what the card is.