The reason I ask is because I recently built a site unlike the type of sites I normally make and it's not performing well. So it dawned on me hey why not make duplicate sites not duplicate content btw. Now I don't mean identical sites but each of my sites has hundreds of phrases from google analytics I don't use as content. Once I hit a hundred pages I stop posting more articles, but those unused article could become a questions and answers site.
So in fact I could double my income by taking the analytics info from those 15 sites and make 15 additional sites so something like site 1 registered nurse.com use info from that and build site 2 registered nurse questions.com focusing only on question and no other aspect.
I would like to hear what you guys think idk maybe I'm way off but I been doing a little keyword research and everything has competition but I know for fact this wont.