Cryptocurrency payment getaways have the lowest transaction fees so that the business owners gets more profit from it. accepting cryptocurrency as a method of payment opens you to more customers internationally. it will helped your business to increase profitability and revenue growth.
There will be no need to pay anymore for payment processors if the transaction is happening as crypto to crypto cause currently the merchant has to pay commission for every transaction from the amount which is high compared to the transaction fee but now the transaction fee has to be paid by the customer whereas in current system customer doesn't pay anything so this can take a while for people to adopt. With the use of lightning network the transaction will be instant with negligible fee too.