"Do you mean remove the extra copies of cards from players accounts. If so that would be horrible as some players have spent time and or money to get the cards."
Indeed. But if their ownership is driving force of market problems, thus such measure would be ... solution.
And I fall into category that would obviously lose. I have spent years (in the past) trying to get my fortune and pretty much succeeded. BUT LISTEN CAREFULLY: When UR went nuts, the market got borked, the inflation got rampart .... All my archievements were already destroyed! When game got sour I had vast collection of cards and worth in essentially broken game. UR already robbed me off - not my cards - but the game that has value so ownership of those cards would mean something. UR took away bragging rights for owning CR's by cryptoz, UR took away the aspect of hard labor by introducing wheel and BM missions, UR destroyed core game balance so the game itself is pretty worthless.
Thats how you destroyed my spent time and collection.
Now. I would not mind losing my copies if it would save the game. Honestly. Because at is it now, my years spent mean nothing. Loss has already happened.