They have to have a lot of less than $10 value decks to make a profit. If they sold 1000 decks for $10/each, and 900 of them were worth $10, 20 were worth $10, 50 were worth $20, 10 were worth $30, 10 were worth $40, 9 were worth $40+, and one was worth $300+, they would lose their shirts and be out of business in a hurry. You're taking a chance. If you bought a $10 raffle ticket for a deck of JNuggs, you'd either win the deck, or lose $10. Here, at least you'll recoup $2, maybe more. It's the same principle, just you at least get something, instead of all or nothing. They will make a lot of money on this promo, but they have to so that they can cover expenses, employees, warehousing and materials, and then still turn a profit. Would I buy a $10 ticket for the chance at a deck of JNuggs? Sure. Would I buy a mystery deck(s) on the longshot that I would get the Nuggets, but knowing that I's still at least get something, instead of nothing? Yes.If you don't like the promo, that's fine, you don't have to buy, but understaning what's going on helps a lot. Someone will "win" and get the JNuggs, you just have to decide if you're fine with that risk based on what you want to spend. Like every contest says in the small print "Many will enter, few will win".
Although I mention JNuggs in my points above, I know notice that they aren't on the deck list (I saw the DOTM pic and accidentally combined the two), the principle is the same. Bottom line is that they have to come out ahead to stay in business.