I'm looking for a credit management system for WP.
I'm working on a website that's supposed to be selling an online magazine.
the readers can buy 1 issue at a time (1 credit)
or buy credit for 3 or 12 issues (3 or 12 credits accordingly)
I need the system to recognize how many credits the reader has left, and every time the reader downloads an issue, to subtract 1 credit from his account until it's finished and then the reader can renew his credit balance. the website will work with paypal.
do you know of any widget or plugin that can perform this task?
any help would be most appreciated.
Thank you very much,