I think the cards are a cool idea and i like the art, but there is nothing the make me want to pursue them. However, tie a deck into an item, or weapon, or something for the game now we have something.
As an observation, would you say thats like being into golf, but not playing and hanging out in the clubhouse? To me that's weird, but whatever you want to do it's YOUR life. I NEVER tell others, no matter how obscure, how to LIVE THEIR lives. Its YOUR LIFE and time do as you want. Its all good, enjoy.