Check out their DevPay service. It's intended use is reselling Amazon Web Services with a markup, but you can also use it to do a simple recurring monthly fee.

Check out their DevPay service. It's intended use is reselling Amazon Web Services with a markup, but you can also use it to do a simple recurring monthly fee. It's dead simple to set up compared to every other ecommerce system I've looked at, including Amazon SimplePay. It's almost like a loophole, finding something so dead simple that doesn't require you to run SSL at your end. If only they could roll that interface out to their other payment products.