I have a client who is looking for an email service (similar to ConstantContact, etc.) that will allow them to have people subscribe to email newsletters on a paid basis.
For instance, someone would sign up for a specific newsletter at $50 per year and then it would send them a notification to continue for another year (with payment) or auto-expire. They don't want to manually keep track of all the subscriptions when they near expiration.
Is there anything out there like that?
