Product IDs are used to determine products that are available for
entitlement (there are different ways a user can get entitled e.g.
in-app purchase, direct entitlement). Products IDs are assigned to a
Collection. Every collection must have a product ID in order to publish
the collection. A collection can only have one product ID; however one
product ID can be assigned to multiple collections (Think of Collection
= Content, Product ID = Entitlement Product)So, if the scenario you're
looking to e...