Pinchpenny: Type-restricting to Treasure (from Silver Mine) is a nerf, so I messed with the attack part; it's supposed to hit more often but not stack Curses (which, I mean, who was gaining multiple copies of a Blockaded card anyways), or if they avoid the Curse then it's more restrictive on their turn. Not an elegant card.
Bounty: Unrestricting the type along with the extra option would make it strictly better than Silver Mine, and I didn't feel like it would be justified as a $6-cost, so I lowered the gaining power. In sets without $4-cost Treasures, this is still better. Oh well. Silver Mine isn't most people's favorite card anyways
Grapeshot: What if we want a Treasure - Attack but no Duration? Maybe we draw a little from Tools, idk
Alright well to be honest I don't think I've gotten any better at making/evaluating cards, which was one of the major goals of this. The other goal was to keep me busy, which it succeeded at somewhat. It has been fun for me, if nothing else, haha
Thanks to everyone who gave feedback, threw in their own ideas, or voted stuff up!