I have bought a handful of these type of cards because i like to collect stuff. But frankly I don't get how this will work long term...... a baseball card or Magic card has value because it has a tangible use, minimally you can look at it at geek over your ownership..... not sure how that translates to a digital currency, how does one gain utility by owning these cards.
Cards will have value only if game exist. so that bring us again to centralized system. In theory, even is EDS turn off electricity, Card owners can make new game, or make other game beside this one. But without any game at all, cards will have, not no value, but a tiny value.
Actually, there is a time when cards will have no value, and that is when counterparty stop to exist.
I am not feeling any better from your post. I don't even see how a $1000 card has value in a game. do the most valuable magic cards get used in games?
as for counterparty, seems some clever engineer can figure out how to connect that asset to another.
All SoG cards are collectible items, even if the game disappears (which I hope it won't) they can be used in other games if anyone wants to. Yodark has mentioned this before.
The other good thing about SoG cards is that they don't get damaged with use like MTG physical cards so you don't have to worry about treating them well, keep them in plastic wrappers, etc.
Even if Counterparty disappears there is still a record in Bitcoin's op_return about your cards so they will always be there. And the way Counterparty works once you set a number of units for a certain asset that can't be modified so you are guaranteed by math if a card is rare it'll always be and cannot be counterfeit.
As players of SoG keep growing there will be more demand for cards and there are loads of collectors out there who are into trading cards so over time the value of some cards should increase. Surely EDS expects to have a good number of players once the game launches and thereafter, imagine 100,000 players (which is not such a big number for games) that want a card that has only 1000 units, or 700, or 300, or 200. What will happen with demand then? Do you think some people would want to get a full deck? How much will they be willing to pay for a Satoshi card?
The easiness on which you can trade SoG cards is also much better than physical cards, I see that as another advantage together with proving their authenticity.
Shoot me a PM if interested. 
