FAQ:
Q: What are the 30 cards?
A: 4vj 4vl 52o 52q 52r 55v 590 593 5f4 5f6 5f7 5f8 5f9 5fa 5fc 5lf 5lm 5og 5oi 5rk 5rp 5ru 5um 5up 5ur 5ut 5v1 61q 61t 61v
In their upped form
Q: Can I use those 30 cards if I don't use any upgraded cards?
A: Yes, you can. If you use 1 or more upgraded cards, you cannot use those 30 cards.
Q: How does this relate to Thanksgiving?
A: Since you are not using the 30 cards to use upgrades, you are giving thanks and showing appreciation that you can use the upgraded cards.