Playing cards in Digimon involves using memory, and using memory pushes the memory gauge in your opponents favor, essentially giving them more resources to work with during their turn
You can copy a Species Specialist for double the card draw, or get a second Adaptive Automaton to stack your teams buffs
In 2021, one of the two demo cards was sold for $360,000 - interestingly, neither card had a Pokmon back - one was blank, and the other, a Magic: The Gathering back (another TCG produced by Wizards of the Coast).
More cards in circulation means more supply, which means lower prices for individual cards, all else being equal
Just make sure you stock up on garlic
Still, Isu is a lot of fun from a card advantage standpoint, and could be a cool, if slightly underwhelming, voltron commander with a blink sub-theme