I just finished a free run for one of mine. I barely got two hundred downloads, and no sales or reviews. Thing is, I contacted all the, about 50, sites you are supposed to inform when you do a free run. I advertised it everywhere I could, even here. I am going to take my books out of KDP as soon as I can. Maybe I just don't know how to use it, but KDP is not working for me. I haven't had a single borrow either. I know some people have had success with KDP, though. For me, the appeal of having books in more places is too much to resist.