Token (credit) system

I was wondering if s2member has support for a token system where a user can purchase credits allowing them to download items from a site using tokens instead of having to pay for access to each post one at a time?
If not, is there any chance we can get this feature added? I see a lot of requests for this type of functionality but have been unable to find a WP plugin that supports it.
If not, is there any chance we can get this feature added? I see a lot of requests for this type of functionality but have been unable to find a WP plugin that supports it.