Payment alternative should probably be on-site payment with something like PayPal Payments Pro as a backend. If you have better idea -- please let me know.
I also considered Chargify.com and Recurly.com, but it does not look like they add much value and their services do not address the most painful part of Credit Card processing: dealing with credit card fraud. Besides, it looks they do not support Google Checkout.
To put my question in context: 1) Web site: www.postjobfree.com 2) Paid service: access to resume contact information (+ some other features that are not as important at this moment). 3) Subscription: $20/month. Google Checkout supports recurrent payments, and as far as I know PayPal Payments Pro supports it as well. 4) Current number of subscriptions ~100 and slowly growing. 5) Current monthly traffic ~165700 visitors/month http://www.quantcast.com/postjobfree.com These are free visitors. Only very few of them are paid users.
So, the question is -- is it appropriate time to work on adding another payment option or is it better to focus on other things for now?