Method, device and system for providing random additional post-payment discount for electronic commercial transaction in open market

A random additional discount apparatus for receiving at least one random additional discount target product from a seller terminal, receiving a random additional discount request from a buyer terminal upon payment for a purchase of the random additional discount target product and providing a random additional discount price to the buyer terminal in response to the random additional discount request,

• wherein the apparatus is configured to:
• extract a random additional discount amount in response to the random additional discount request;
• determine whether the extracted random additional discount amount satisfies a predetermined condition;
• transmit the random additional discount price determined by the random additional discount amount satisfying the predetermined condition to the buyer terminal;
• and
• repeat the process of extracting a new random additional discount amount and determining whether the new random additional discount amount satisfies the predetermined condition, and
• wherein the predetermined condition that the determined random additional discount amount Di should satisfy is
• CT−DT≥0,
• when M sellers sell products on the open market the total result of product sales by the M seller for a predetermined period of time is summarized as follows:
• RT=ΣR1+ΣR2+ . . . ΣRk+ . . . +ΣRM
• (Here, ΣRk=sales revenue of the seller k, RT=total sales revenue of all the M sellers);
• CT=ΣC1+ΣC2+ . . . ΣCk+ . . . +ΣCM
• (Here, ΣCk=sales commission received from the seller k, CT=total sales commission received from all the M sellers);
• DT=ΣD1+ΣD2+ . . . ΣDk+ . . . +ΣDM
• (Here, ΣDk=discount subsidy provided by the open market operator for the sales of the product of the seller k, DT=total discount subsidy provided by the open market operator for the sales of the products of all the M sellers).

A random additional discount method provided by a random additional discount apparatus for receiving at least one random additional discount target product from a seller terminal, receiving a random additional discount request from a buyer terminal upon payment for a purchase of the random additional discount target product and providing a random additional discount price to the buyer terminal in response to the random additional discount request,

• wherein the method comprises:
• receiving from the seller terminal the seller information and at least one random additional discount target product for registration;
• receiving from the buyer terminal the buyer information and payment completion information for a product to purchase;
• in response to the payment completion information, transmitting at least one random additional discount price to the buyer terminal;
• and
• receiving from the buyer terminal a purchase decision,
• wherein the transmitting further comprises:
• extracting a random additional discount amount;
• determining whether the extracted random additional discount amount satisfies a predetermined condition;
• when the determined random additional discount amount satisfies the predetermined condition, transmitting the determined random additional discount price to the buyer terminal;
• and
• when the determined random additional discount amount does not satisfy the predetermined condition, repeating the steps of extracting a new random additional discount amount, determining whether the new random additional discount amount satisfies the predetermined condition and transmitting the determined new random additional discount price satisfying the predetermined condition to the buyer terminal, and
• wherein the predetermined condition that the determined random additional discount amount Di should satisfy is
• CT−DT≥0,
• wherein, when M sellers sell products on the open market the total result of product sales by the M seller for a predetermined period of time is summarized as follows:
• RT=ΣR1+ΣR2+ . . . ΣRk+ . . . +ΣRM
• (Here, ΣRk=sales revenue of the seller k, RT=total sales revenue of all the M sellers);
• CT=ΣC1+ΣC2+ . . . ΣCk+ . . . +ΣCM
• (Here, ΣCk=sales commission received from the seller k, CT=total sales commission received from all the M sellers);
• DT=ΣD1+ΣD2+ . . . ΣDk+ . . . +ΣDM
• (Here, ΣDk=discount subsidy provided by the open market operator for the sales of the product of the seller k, DT=total discount subsidy provided by the open market operator for the sales of the products of all the M sellers).