Not much Digital Golg team can do with that.
My suggestion as solution to this problem is to add another coin to marketplace with low or even zero fees and blazing fast transactions.
There are plenty of such coins XLM, TRON for example. I don't discuss these projects only their coin and to be honest lately I use only these two if I need to send coins lately.
Withdrawal fees in some exchanges spiked even to 25$ or 35$ for USDT or USDC (Poloniex

), so no fees on Digital Gold Marketplace should be more appreciated, I think

.
Yesterday, when I made a trial to withdrawal with USDT, the fee is $37.

The GOLD team planned to wait for great changes with lower transaction fees from ETH 2.0 and if it goes smoothly, they will not consider other altcoins. From their strategies, I see they want to stick with biggest blockchains to avoid any risks from replay attacks, delist, lawsuits, etc.
Right now we are not planning to add new coins to the marketplace. We should wait when the ETH 2.0 will be implemented. Commissions should be lower than.