I'm not sure if you mentioned, but Steem is also great for merchants, bitcoin and eth take ages to verify transactions, Steem is 3 seconds and is better than credit cards because there are no chargebacks. We have this setup nicely at https://shop.buildteam.io, also it is really powerful because you can parse the chain for transactions and get your apps to update statuses etc of services, good luck trying to parse your fiat bank account easily without paying for some expensive service.