Implement a way to remove cards from the economy.
As it stands right now, as people keep buying more booster packs, rare cards are gonna become much less rare, and anything less is gonna be worthless. It'd be a good idea to add some feature that can actually remove cards from the game completely. Maybe a sale feature of some kind. It'd be nice to be able to do something with the load of common cards you don't have use for that definitely won't sell.
You are now able to ‘dissolve’ extra cards with Career v2
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2wayspeaker commented
Like the card recycle function on the gameboy games.
You inserted a selection of up to 10 cards into the machine, the machine totalled the value of those cards and you received a random card of that value in exchange for your useless ones.