pokemon bandai cards JP Ninetales Carddass (1996) #038 Green CGC 9 – Zapp! Comics the “Pokemon Card Game Scarlet Pokémon Card Game Scarlet &

Professionally, Greysun has been writing and editing video game content for over a decade

Or as @pikachutcg said, it could just be some other benign explanation

The closest I could find to anybody doing it in the mainstream recently was Artifact (I know, I know, I'm stretching the word "mainstream" here) with a slightly bastardised version of the concept handled via Steam's marketplace, and even then it's still an online auction house, not just doing fun swaps with your pals and saying "well I've got this, what've you got?", like exchanging the best parts of your packed lunches at school

The card is highly playable as well