Why not increase the research topics to 10 or 15 to tag when asking a question in Research Gate? Would not that increase the visibility of the question to more Research Gate members?
I guess for the purpose of ''optimal categorization'' and ''area-zation'', that is in order to encourage people to be more topic-centered and specific. But why can't we add other tags in the course of a thread/conversation as we introduce or touch upon other topics?
Yes, limiting the tags enhance the specificity of the questions and replies actually. I think adding more tags through in the conversations that usually elaborate to be long from quite specific questions is a very good suggestion.