Heres a breakdown of every currency, how its used, and every in-game activity that rewards those items, all of which can be spent on additional packs and cards completely free
So Konami with the card game and other companies selling merchandise have to appeal to people who are already into it
Supreme King Gate Infinity Type Pendulum Effect Monster Attribute DARK Typing Fiend Level/Rank 7 Archetype Supreme King Typings Pendulum / Effect TCG Date 2017-05-04 OCG Date 2017-01-14 Pendulum Text If you control a monster, you cannot Pendulum Summon
Theyre numbered above the number of cards in the set as theyre technically secret, and that definitely makes them more desirable
Should you be sufficiently ahead and Jace gets two or more -2 activations then it is better card draw than Fact or Fiction as well
Before discussing what they can potentially add, I do want to swing by green