Social Networking Service is an online service, platform, or site that focuses on building and reflecting of social networks or social relations among people. It's developing by leaps and bounds, and has some notable features in the information economics, such as abundant resources, high user viscosity, interactivity, network externalities, and herding effect and so on. Three possible suitable profit models are put forward for SNS: the effect advertising, third-party co-application platform, and the combination of mobile terminals and network services.
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