I looked in to Payoneer and couldn’t find a way to set up a URL to receive payments from people. If someone has any information about it, please post it here or send it my way.
I’ll add MicroPayment to the allowed list.
As for supporting multiple payment services, that’s a good idea, but it won’t make it on the first iteration. The old front end, the plans for the new one, and the Add-ons Manager are all designed to have only one option. If there are enough requests for multiple payment providers, we’ll consider a more flexible UX for this as a followup.