主权项 |
1. A method comprising:
receiving, by a server system, a record of a first transaction concluded on a point of sale (POS), the record including a user identifier, one or more item identifiers, and a price paid for each item identifier of the one or more item identifiers; subsequent to the first transaction, identifying, by the server system, for each item identifier of at least a portion of the one or more item identifiers, a third party record, the third party record corresponding to the each item identifier and having a third party price; subsequent to the first transaction, identifying, by the server system, one or more discounted identifiers of the one or more item identifiers, the third party price of the third party record corresponding to the discounted identifiers being less than the price paid for the one or more discounted identifiers by one or more price differences; and crediting, by the server system, an account associated with the user identifier with an amount corresponding to the one or more price differences. |