^Title.
Like they're just playing simple big 3 and such. That game is so easy to cheat in. And I'm assuming the author is a newbie at card playing because nobody in the right mind would doctor an entire deck for infrared prints (Not to mention you require about 5k USD to do a good job of inking; it's considerably hard to put infrared ink on a card so small and so thin. And obviously the cost would be greater than the gain (300k yen, or 3,000 USD), in which there would be no point in doing so.) . Because you can modify infrared prints so easily. You can literally just breath into your hands, then rub your hands all over the card. Done.
Not to mention putting an infrared scanner onto a phone? B*tch please. That usually requires a separate device. The separate device itself costs around $30, but putting that onto a phone while also having a fully functional phone on top of that would require at least 3 grand.
Cost: 8 grand
Result: Easily ruin-able cards. If someone even puts it on a computer while running, you can say that 8 grand goodbye.
You don't even have to stack 2 cards together. Also 90% of newbies think "stacking 2 cards in your hand when it only is seen as one" is called cheating. It's not. It's actually commonplace in many of American casinos.
This school for a good gambler like me would be a better get-rich-quick plan than Enron stocks.