I am relatively sure this can't be done yet, but worth checking. Is it possible to create an Expresso Store promo code that is only available to a specific member/user?
The idea here is to generate a discount promo code as a sort of credit/reward to a user for something he/she did, like register on the site.
The only thing I can think of at the moment is to create an additional table that will link a member to a discount promo entry. And then validate this myself during the checkout process.
Anyone with a better idea without hacking Expresso Store self?