Oh wow, that's super cool thanks for letting me know! I had no idea about the "=0" thing, still can't really wrap my head around but I'll have to look out for that combo more. It was my understanding that Areca Nut changes your starting number from 0 to something else, so changing it from 0 to 0 seemed confusing.
Yeah, I'm assuming the cost also compounds based on what the card does so that might be why I found a few +5 mill shop options surrounded by 5-30k ones near the beginning of the game very rarely. But for a jam game, the balance and polish is excellent, can't wait to see it developed more!
Thanks! It was a fun run! I think the nature of these games the scores can go crazy exponential. This was my score on my next run after that!