Doworry about a valueproposition foreachcustomersegment, differentiatedkeyassetsandkey partners, andrevenueand cost components that characterize the economicdriversof the business.
As far as i understand about the valuation of Facebook company, the keyrevenuedrivers shown by Mr damodaran was exactly right, but there are two more main points to consider i.e how many genuine active users they have as well as how much time there is no such social networking site in this competition.
And developing that talent is one of the most significant driversof employee engagement, which in turn is the key to the business outcomes you seek: revenue, profitability, innovation, productivity, customer loyalty, quality, and cycle time reduction.