I am not sure I understand how that works.. So, they have mijireh included in the plugin. I see we have to pay mijireh for each transaction but.. they do not really handle the payments because they ask us to register on one of the supported payment gateways. So, we'll have to pay the gateway too? What gateway to chose if my customers are from all over the world?
You don't "need" Mijireh. It just helps offload most of the PCI compliance. Yes, you still need a gateway. I'd recommend adding the Stripe plugin and nothing else. They have an option to use an overlay to collect card information securely so you don't need to do it on your cart page. Good luck! Elliott