This is an scientific abstract from a research group who is studying the effect of choosing to be associated with people who cooperate and the ways that this cooperation can encourage others to choose them.
It's too bad that Nature magazine couldn't have been more COOPERATIVE and released this research a free article, then more of us would have access to it and could CHOOSE to learn more about Nature and its parent organization.
Hmm! Maybe that is the point the staff at Nature is choosing not to cooperate with the "great unwashed", so we will not choose to cooperate or even try to learn more about them. Maybe they fear the loss of their exclusivity?