There are lots of cryptocurrency payment gateways. Each of them have different processing fees and transaction fees. some of them charge 1% to 5% fees on each transaction. which is a huge amount but merchants have to pay this amount. But there are payment gateways who charge the lowest amount like, one payment gateway only charges 0.23% processing fees on transaction. I find it very attractive because merchants will get more from it and it will be more beneficial for them eventually.
Of course there will be no questions about that the lowest withdrawal fees will always brings the best beneficial for the marchant. It is not only in the case of crypto currency but also in the banking system and the banks which provide their services through low fees are beneficial for a merchant.
This happened is not only in the case of merchant it is also beneficial for us I always choose the lowest withdrawal fees exchanger. Before the FTX crash I always use that for the lowest withdrawal fees required exchanger.
And in the case of traders, the transaction is quantity more than others normal users, so one percentage withdrawal fees are very beneficial for them. However, while looking for low fees, you must be careful to choose the payment gateway is good.