What the four codes are worth together
Add the four rewards and you get 1,500 Stardust, 6 Card Draws and one Epic Harbor Otter. The Stardust matters first because it is the same currency the lantern vendor takes, and the pet matters once you have a slot free. Card Draws feed the card system, which has its own third-slot game pass at 219 R$, so six draws is enough to see what the system does without buying anything.