It seems that bga has recently updated the new expansion of Splendor: Duel, which is the counterfeiters Expansion. I used two of my accounts to play a friendly game to test what is added. I have gone through all the purple new cards and all the new royals and I only found one card that can prevent the hoarding situation to happen - that is the one showed below. It requires a pearl and a glassware token to buy and it can turn a glassware token into a pearl. So even when your opponent holds all of the golds and pearls, you can still use glassware tokens as pearls. And there are four glassware tokens in total. However, if this purple card doesn't come out (note that there are 16 purple cards in total) or this card is purchased by your opponent,
you will still be completely controlled if your opponent take the hoarding strategy. Although there are other purple cards that maybe very powerful, it still doesn't solve the problem of hoarding as all other purple cards and new royals cannot compensate for the lack of pearls and golds - they just either enable the glassware tokens to be some color except pearl or they provide abilities that is not related to pearls.

you will still be completely controlled if your opponent take the hoarding strategy. Although there are other purple cards that maybe very powerful, it still doesn't solve the problem of hoarding as all other purple cards and new royals cannot compensate for the lack of pearls and golds - they just either enable the glassware tokens to be some color except pearl or they provide abilities that is not related to pearls.
