The strength of Facebook is not just in the data – it is in the synergy between huge user participation, social networks, and advertising needs. If the platform understands what interests its users and there are sufficient Numbers to reach, then advertisers are ready to pay.Why has Facebook grown to be profitable while other social networks haven't? Is it because facebook actually had real people on it, so they could harvest their real data and resell for good advertising, while other social networks mostly have anonymous people?