1. The document discusses assessing the real value of customers' word-of-mouth (WOM) marketing through social networks. 2. It argues that calculating the social value of a customer, or how much they bring through influencing others, requires considering the lifetime values of their network and how word of mouth spreads and changes values over time. 3. The author presents an approach for calculating social value using agent-based modeling of social networks to simulate how products spread and the resulting profits under different conditions.