The problem I see is releasing that many promo cards in that short of a time in this climate. If I had to guess, they'll be a lot more expensive than they should be because no one can seem to read a room. In the past, there were many people (myself included) who felt like they had to FOMO in to everything that was ever for sale. So much so that we worried about how quickly things would sell out. Well, back then, there was a reasonable expectation that these assets would increase in value in the future. That is no longer a reasonable expectation, in my opinion. I think we might be overestimating how many people are left that will buy these cards. I almost certainly will not be buying any of them. 

I think this could end up being a bad deal for the DAO if the cards sell poorly. That said, what else should the DAO even spend money on? If there's no game, there's no point in there being a DAO. So why not... let's take a shot in the dark and hope it works out. I don't have any better ideas myself.