Absolutely agree, but that won't stop some scumbags from trying, and this mechanic provokes that behavior more than others, I feel. Plus, there's the monetary aspect, still. Which, coincidentally, also makes cheating more likely, because then you don't have to pay for the card twice. Also, what if a player does have money to burn? Ruleswise, if you have to provide a decklist, what are you going to say? One of my Gold Mines has one mark, the other have zero. One round in and the decklist should realistically be outdated, but there's no way to actually check the Mines got used (or at least it's very labor intensive to do so), so if you do a deck check after round three, and there's still three Gold Mines with zero marks and one with one mark, did the player cheat? I mean, it's unlikely that they didn't use Gold Mine at least ones over three matches, but not impossible. How many times is that player, if they're a cheater, going to go to the bathroom between rounds to secretly sleeve up a few fresh Gold Mines? The design is great for this product, but it would be a nightmare in sanctioned play.
Wait is there a rule that says you can’t switch out cards for other cards with the same name?