Roles are important in understanding member participation in an online community and in explicating and organizing the community’s work. Community roles can be formally defined and assigned together with related activities and power privileges, or they can be undertaken informally through self-selection . Users may play different roles at the same time or at different times. Preece and Shneiderman  proposed a conceptual framework to characterize users’ successive levels of participation or roles in online social communities as evolving from reader to contributor, to collaborator, and finally to leader. Furthermore, users may abandon a community if it no longer meets their needs and objectives . Wu and colleagues  found that researchers’ engagement in online RIMSs changed as their career status changed and influenced their perception of the costs and benefits of using a specific RIMS. Some researchers gave up curating their RIMS profile and actively promoting their research through the RIMS after they secured jobs and were no longer motivated by the objectives of those activities. Haustein and Larivière  analyzed journal articles from four disciplines (i.e., biomedical research, clinical medicine, health, and psychology) in Mendeley and found that the majority of Mendeley users were junior researchers, such as doctoral students, postgraduate students, and postdoctoral researchers (aka postdocs).