I think its because Facebook is more attractive in a simple kind of way and its where most people around the world communicate with one another....
Face book is more loyal to users, user friendly , more options and providing more traffic too. So compare with other networks facebook is the best.
I've never actually used facebook for marketing purposes, only twitter. Guess i probably should change my strategy
Hehe. Yea. twitter is good also for social networking sites.But facebook hooked up all people,students,professionals,even the bloggers to advertise. Just post it to your facebook. then share to everyone.^_^.
facebook is best because of its flexibility. aside from using it as promotion and driving quality traffic because you can easily reach you target market, you can also use it to chat and even find old pals.