Abstract: Provided is a reward calculation system including at least one processor configured to acquire payment information about a payment of a transaction object traded on a user terminal used by a user; acquire a user attribute of the user; calculate an estimated reward potentially provided to the user terminal, based on at least the payment information and the user attribute; cause the user terminal to display the estimated reward; and acquire, after the estimated reward is displayed, receipt information included in a receipt image in which a receipt issued for a transaction of the transaction object is displayed.

Abstract: Provided are a privilege granting device, a privilege granting method, and a program capable of providing motivation to continuously purchase a product by posting and checking, between shoppers having purchased the same product, that an activity associated with the product has been done. A post acceptor accepts, from a shopper having purchased a product, a post that the shopper has done an activity associated with the product. A publisher publishes the accepted post. A report acceptor accepts a report that another shopper having purchased the product has read the published post and checked a content of the read post. A determiner determines, when the shopper repurchases the product, a privilege to be granted to the shopper according to whether the report is accepted.

Abstract: A payment system and method that changes a degree of disclosure of personal information provided for a store, including a settlement server that acquires a disclosure level of personal information when an electronic settlement from a user terminal to a store is detected, the disclosure level being set by a payer at present. A picker picks out a new disclosure level different from the acquired present disclosure level. A presenter presents first information about the present disclosure level and second information about the new disclosure level in a selectable manner at the user terminal. In accordance with a selection result in the user terminal, a provider provides the store with partial information extracted from the personal information according to the selected disclosure level. Then, an updater updates the disclosure level to the new disclosure level when the selection result is the second information.

Abstract: A payment system and method that changes a degree of disclosure of personal information provided for a store, including a settlement server that acquires a disclosure level of personal information when an electronic settlement from a user terminal to a store is detected, the disclosure level being set by a payer at present. A picker picks out a new disclosure level different from the acquired present disclosure level. A presenter presents first information about the present disclosure level and second information about the new disclosure level in a selectable manner at the user terminal. In accordance with a selection result in the user terminal, a provider provides the store with partial information extracted from the personal information according to the selected disclosure level. Then, an updater updates the disclosure level to the new disclosure level when the selection result is the second information.

Abstract: Provided are a privilege granting device, a privilege granting method, and a program capable of providing motivation to continuously purchase a product by posting and checking, between shoppers having purchased the same product, that an activity associated with the product has been done. A post acceptor accepts, from a shopper having purchased a product, a post that the shopper has done an activity associated with the product. A publisher publishes the accepted post. A report acceptor accepts a report that another shopper having purchased the product has read the published post and checked a content of the read post. A determiner determines, when the shopper repurchases the product, a privilege to be granted to the shopper according to whether the report is accepted.