It will either be unsold due to unreasonable prices, or it would be sold out with a loss, leading to an unsustainable business model.
It's not an issue, since they will not dump all the coins they got from the sale. Rather just up the market bit by bit and sell little by little in time to get the money back for the next batch. Just like the whole BlackCoin - Multipool, all this does it create an incentive for the buy orders and the price to go up.
The only manipulation can and prob will occour is a pump before listing the cards, if the price does not adjust, so some bag holders could get cheaper cards and then dumps afterwards when none are in stock in order to buy more cheap coins.