This book can be accessed here:
Really, We're Helping To Build This . . . Business: The Academia.edu Files, charts the recent debate about for-profit academic social networking sites (aka research sharing platforms) such as Academia.edu, ResearchGate and Mendeley. It features contributions from Gary Hall, Kathleen Fitzpatrick, Eileen Joy and Guy Geltner, among others.
The editors are particularly keen for users to contribute to the section on alternative platforms, to raise awareness about the not-for-profit, institutionally supported and/or scholarly-led alternative initiatives for sharing and discussing research.