This. You basically have to use PayPal or Amazon Payments when you're dealing with microtransactions if you don't want to lose up to 40% just in processing fees.
The workarounds with bundling transactions don't really work for my use case.
The workarounds with bundling transactions don't really work for my use case.
I'm pretty sure the OP was referring to credit/debit transactions...
I think Knox with a fallback to Amazon Payments is a great stack for Micro if you want my opinion.