Patent ID: 8775261

Claim:
A network advertisement delivery system, comprising: a plurality of terminals including a first terminal and a second terminal, the second terminal being extracted as having an association to the first terminal; a first information processing section that stores purchase information when users corresponding to each of the terminals purchase articles or services; and a second information processing section that stores information of terminals and association between the terminals, wherein purchase information of the first terminal is sent to the second information processing section from the first information processing section, wherein the second information processing section sends the purchase information of the first terminal to the second terminal, wherein when the second terminal is notified that the first terminal has received an article or a service from the first information processing section and when the second terminal receives from the first information processing section an article or a service substantially equal to or associated with the article or the service provided to the first terminal, the first information processing section provides an amount of affiliate to the second information processing section, wherein the second information processing section stores association information of a relationship between groups of users and the terminals, wherein the first information processing section delivers the amount of affiliate to the first terminal according the association information stored by the second information processing section, wherein the second terminal issues a friendship registration request to a module of the second information processing section to register a friendship to a user of the first terminal, wherein the module notifies the request from a user of the second terminal to the first terminal, wherein, after the first terminal approves the request, the first terminal notifies to the module and the module notifies to the second terminal and registers the friendship between the first terminal and the second terminal, and wherein, after the friendship between the first terminal and the second terminal is registered, the module notifies to the second terminal an event that the user of the first terminal has purchased articles wherein the plurality of terminals further includes a third terminal that issues a one-sided subscribe request to the user of the first terminal.