This chapter focuses on the largely unexplored spill-overs between category kings and commoners within and across the different sectors in the sharing economy. In addition to being highly visible members of many industries, category kings have attracted attention from researchers in various streams. Prior work has articulated "anchor tenants" in emergent geographic clusters (Powell, Packalen, and Whittington, 2012), market-dominant "kingpins" within industry value chains (Jacobides and Tae, 2015), and "cognitive referent" firms in novel product markets (Santos and Eisenhardt, 2009). However, most studies have overlooked what goes on with the majority of the members in the same category, i.e. category commoners (McDonald and Eisenhardt, 2017), particularly how they might benefit / hurt from the existence and activities of category kings. Our chapter addresses these questions by examining spill-overs within the context of sharing economy categories. Sharing economy is an umbrella term, associated with a plethora of similar concepts referred to as the platform economy, collaborative consumption, the gig economy, crowd-based capitalism, and access-based consumption (Botsman and Rogers, 2010;