“…Some pointed out that the involvement of a PMC is the key to coordinating collective actions (Christudason, 2008a;Hui, 2005;Yip, Chang, & Hung, 2007;Yiu, Wong, & Yau, 2006); others recommended social sanctions and norms to facilitate action (Bengtsson, 1998(Bengtsson, , 2001McKee, 2008;Yau, 2010c). Some empirically showed the number of users as a determinant of a group's collective action prospects (Hung & Chang, 2002;Lai & Chan, 2004;Yip et al, 2007); others indicated that individual participation is of paramount importance to the success of a collective action (Simmons & Birchall, 2007;Yau, 2010aYau, , 2011aYau, , 2011b. On one hand, the diverse results showed the research approach to the problems from different perspectives.…”