Argh, I saw this two weeks ago, did a "remember to buy this when you get home" thing, and then forgot. I hope the expansion cards are made available somewhere. I enjoy CAH and am glad to send money as new bits are made available.
It'd be interesting to see if the "pay what you want" strategy works for you guys a second time now that you released such detailed data. You'd think it might make people more likely to pay exactly your equilibrium point just to see if they can get away with it.