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A comment on Ask HN: Looking for paypal alternative I could use for subscriptions..
http://www.recurly.com/
http://www.braintreepayments.com/services/recurring-billing
https://stripe.com/docs/subscriptions
http://www.recurly.com/
http://www.braintreepayments.com/services/recurring-billing
https://stripe.com/docs/subscriptions