The examination of individual activities showed that 55 participants (13%) answered questions from other members of a RIMS, whereas 281 researchers (68%) revealed that they only maintained their RIMS profiles, and 115 researchers (28%) endorsed other members for their expertise. Thus, substantially higher numbers of researchers were willing to endorse other members and maintain their profiles than to answer questions. This result could be explained by the higher cost of answering questions relative to endorsing researchers for their expertise. Another explanation could be that RIMSs might give researchers more opportunities to make endorsements than to answer questions that researchers find interesting and relevant to their research interests. As one participant noted, “The [system’s] UI design encourages [making endorsements]—makes it quick and convenient.” (S71)