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.
Yes it is merchant could find it more convenient to them since they can save fees and that would be a good boost to their sales if they find some platform like this will exist. Hopefully there are new players in the market will compete against those giant platforms asking higher fees to there transaction since this can give us huge relief when doing some frequent transaction from multiple people everyday.
Yes there are platform out there that charges minimal amount on transactions like
https://coinremitter.com/?utm_source=rep&utm_medium=bitcointalks this only platform charges 0.23% processing fees and also has other advantages like free plugin, free plan and affiliate program!