Shopping cart using a points system

I would like to use a points system, rather than direct purchase, much like what iStock photo uses. The user would purchase points, then use the points to download digital products.

Do any of the shopping carts presently have such a points system?

-Scott

If not points, how about a system that has store credit ability?

Well i will try this again… I don’t work for enterprise advance, but i do use it and i’m just trying to help but i got banned for my last comment for some reason… Maybe i just don’t understand something. But I will try again. I know WITH THE CART I USE, enterpriseadvance.com has a store credit ability too.

Thanks @GlobalMe; I actually received and attempted to reply to your initial response. In the interim, I contacted EA. As you stated, the EA points system is a ‘loyalty’ program. What I’m interested in is a system like many stock photo sites, i.e. istockphoto.com, whereby the customer first purchases points, or credits, then makes their selections.

-Scott