We can suggest the new gambling site add altcoins to their site to help the gambler reduce the withdrawal fee if they use bitcoin or ethereum. With the increased price now, people feel not right with the fee, but they can not do anything except follow it.
Yes, new gambling sites can add altcoins withdrawal system. By following this, it may help them for marketing. It will be considered as a marketing tool for them which will help a lot to grow faster and also will he helpful for gamblers too. But we are doing withdraw with forcibly high withdrawal fee.
That will be part of the promotion to attract more gamblers to visit and join that site. I am sure that will make gamblers like to stay on that site because they can have the good option to deposit on their favorite coins without paying a big fee if they want to withdraw their win money. Besides that, it can make it comfortable for the gambler and they will not leave that site because they do not want to deposit on the other site.