“…Other work discusses how leaders can promote successful communities, advocating leader activities including: to encourage contributions and discussion [13,15,17,27], contribute and read content [5,13], organize and curate content [1,13,27,36], deal with disruptive behavior [1,5,13,15,17], create a positive environment [1,5,13,15], foster connections [17,35], manage new members [17], advertise externally [5,15], and maintain infrastructure [1,5,15,27,36]. Again, these works don't directly examine leaders' main challenges, motivate designs for leader tools, or observe how leaders use such tools.…”