Yes, but most of these are leafs on the (imaginary) unified global social graph.
Twitter's active users are much more likely to not be leafs, but multipliers, some able to reach even people completely out of reach of any social network (by transporting a story over to other media, like print or TV). And considering that even Facebook only has a minority of the world's population among its gigantic user base (and an even smaller minority among its active users), the ability to reach out to other media through Twitter is extremely valuable, in my opinion even more valuable than the ability to reach the giant Facebook user base directly.
Yes, but most of these are leafs on the (imaginary) unified global social graph.
Twitter's active users are much more likely to not be leafs, but multipliers, some able to reach even people completely out of reach of any social network (by transporting a story over to other media, like print or TV). And considering that even Facebook only has a minority of the world's population among its gigantic user base (and an even smaller minority among its active users), the ability to reach out to other media through Twitter is extremely valuable, in my opinion even more valuable than the ability to reach the giant Facebook user base directly.