Will "Membership" work for this..
Hypothetical idea; but same concept.
Users can "buy" access to a set number of alerts (maybe its by category, brand, type, etc.) and they can pick what exactly they want alert for.
Lets say you have a restaurant and for some reason people want to be alerted to new foods you have on the menu (why you would pay for this is beyond me).
I want an alert every time you have a new "Mexican" dish added. Or maybe I want to be alerted every time you add a gluten free dish. Or maybe even when you add a special drink with cucumbers. Any of the above..
I want the subscriptions to be based on some set of criteria, but not an all or nothing... Can membership do this?
Sorry - hard to explain...