If you use an embedded board to program an RFID tag that's then printed onto playing card decks to verify the authenticity of the brand, i.e that's it's not a knockoff, the problem is few manufacturers are interested in such an idea
And finding cheap RFID tags at scale can be a problem if you want to optimize supply chain costs, basically, if you purchase a deck of cards at a local store for a few bucks, there's a lot of calculations that are made in order to choose that price