Service providing server, service providing method, service providing program, and link spreading system

摘要

PROBLEM TO BE SOLVED: To provide a link diffusion system for effectively transmitting and diffusing a URL link related to a membership service in a Web site which provides the service, within a community.SOLUTION: A link diffusion system comprises: a service provision server for providing membership service; an information transmission server for providing information transmission service; and a client terminal. The service provision server comprises a membership DB for holding information for each member showing whether the member is a paid member or not. The client terminal comprises a service use application and an information transmission client application. The service use application submits an input comment when the paid member uses the membership service, embeds a URL link in the comment, provides the membership service under limited use conditions to an unpaid member when the member selects the URL link embedded in the comment, and makes the member newly input and submit a comment in which the URL link is embedded when the member finishes use.