You can monetize all of your stories. I decided not to monetize all of mine; having a high volume of stories prior to enrolling into the program is partly why I am able to continuously earn more each month; they are not astronomical increases though.

In short, we can roughly decide why our stories may or may not get reads. It's really up for us to determine, but it's always interesting reading other writers perspectives.

Personally, I don't go out of my way to read longer stories, etc.

Happy Writing & Earning!