I recently came across this very interesting information on Facebook.
Yes, authors are not making much money, and we really need the support of our friends, fans, and followers, just to be seen on Amazon and other sites. If we can manage to get 50 reviews, our books will start to show up in the "also bought" links and may appear in other promotions. The reviews can be short; sincerely liking a book is all that really matters.
As it happens, my friends at Amazon provide a generous preview of my book via the "look inside" feature, so even those who haven't yet bought the book can get a good taste of it. Please take a look. Your support means a lot to me.