Amazon ratings don't matter to me, one sale can shoot you up the ladder for weeks, but it is only one sale. I get so few on the site I don't usually add to what is there.
One of my next stories is going to be written just for the sake of the boost. I have a feeling that is I write a dragon story one person in the USA will snap it up; I don't expect to be paid as they return the e-book within a day.
You could say, why write it if you aren't getting paid for your time? Well, you're reading my blogs for free, what's the difference?