1Henry Jenkins, " Afterword : The Future of Fandom," Fandom: Identities and Communities in a Mediated World, eds. Jonathan Gray, Cornel Sandvoss, and C. Lee Harrington (New York: New York University Press, 2007 ).
2David Cheal, The Gift Economy (New York, Routledge, 1988).
3Henry Jenkins, et al. , "If It Doesnt Spread, It's Dead (Part Three) : The Girl Economy and Commodity Culture", 11 Feb 2009, online: http://www, henr- yjenkins, org/2009/02/if_it_doesnt _spread_its_dead_p_ 2. html.
4John Banks and Sal Humphreys, "The Labor of User Co - Creators: Emergent Social Network Markets?" Convergence: The International Journal of Research into New Media Technologies 14.4 (2008).
