Single post in Market affected by credit discount

I’m sorry for bringing this out again(I couldn’t find anything about time restrictions), but would a discount on the 5% fee work for dusky days? I get that it wouldn’t be much, but maybe a slight reduction in that fee could make a bit of difference in higher priced market sales. It would be like other dusky uses where the currency is removed instead of the initial suggestion where it’s just shifted around. I don’t know much about the economy so this might affect it badly or might not.