What if Zanz would take, say, $50 via Paypal to add a new card to the game? It would have to be balanced, programmable, and not add a massive new aspect to gameplay, but for a simple card (no more complex than, say, Crusader).
I don't know if that would even begin to cover his time, but it'd be fun for the community, and more cash-in for him, which means it's easier to spend more time programming this awesome game.
I know, it's a pipe dream...but it's a fun one. I'd probably drop a couple hundred a year on a new card of my choice every few months.