| 摘要 |
PROBLEM TO BE SOLVED: To effectively advertise a commodity sale which uses Web page. SOLUTION: A seller server imparts an introducer ID to a customer A who purchased a commodity on a sale Web page, and an electronic coupon 400 containing the introducer ID as primary introducer is sent to the customer A to ask for an advertisement. The customer A, who received it hands it to an acquaintance or the like. When a customer B who has received the coupon 400 purchases a commodity over the sale Web page, an introduction reward is added up to the introducer (customer A) registered in the coupon 400, and a new coupon 42 with the introducer ID of the customer B added to the primary introducer is handed to the customer B. When a customer B purchases a commodity through the use of the coupon 402, the reward for introduction is distributed and added up to the customer B as primary introducer and the customer A as secondary introducer. |
