I am looking into online stores to use internally at a company. They would like to be able to add credit to a users account as part of an incentive program.
I have started looking at Online store software, but am not clear as to which support store credit, or if it is a function of the payment module (ie separate issue).
The credit shouldn't be in the form of actual money (so it shouldn't be like putting money on a users paypal account), but credit which can be redeemed in-store.
You could implement this easily in Satchmo with the Giftcertificate-Module. You can assign a GiftCertificate an amount of money and the user owning this code can use it on checkout to pay. If the cart-amount is less, then the GC can be used afterwards with the rest-money on it. And if it isn't enough money on it, the user can pay the rest with any other payment method available.