Blood Lust

In Mary Williamson's Conclusion, she makes reference to the link between capitalism and vampires, through the works of Marx. She then goes on to say that, "The vampire enters the permanently transient culture of capitalism, adapting and evolving in order to keep pace with the cultural moment." With this theory in mind, what is the current adaptation of the vampire saying about our culture and society today? Is capitalism to blame for "Twilight"?