Perhaps your firm has found Facebook effective because of its altruistic nature. People want to share great things that they are involved in: nonprofit work, political activism, etc. Advocacy for such issues and causes are something FB users probably want to share with their friends.
Meanwhile, I imagine that people don't really share things like "I really like the new model of the Cadillac XYZ!". Maybe they think that their friends will view it as shallow gloating; maybe you don't want to reveal the fact that you bought a new car.
Facebook revolves around "Sharing of information". Brands that have values that users want to share with their friends will do well. Those that can make users think twice about sharing (even if they really do like the brand) may fare worse.
Meanwhile, I imagine that people don't really share things like "I really like the new model of the Cadillac XYZ!". Maybe they think that their friends will view it as shallow gloating; maybe you don't want to reveal the fact that you bought a new car.
Facebook revolves around "Sharing of information". Brands that have values that users want to share with their friends will do well. Those that can make users think twice about sharing (even if they really do like the brand) may fare worse.