An elegant demonstration of a technique that works for most products on Amazon. Isn&#x27;t it incredible how virtually every product you look at on Amazon is a #1 best seller in its category? At the very least, it&#x27;ll be in the top 15. They only sell the best-possible products on there, right? Oh, it&#x27;s only because the categories are so endlessly varied--er, &quot;precise,&quot; that each one conveniently only has 8-15 products in it.