As an independent book author, I don’t have unlimited funds to spend on marketing. The name of the game is to get my books downloaded onto as many e-readers as possible (that 15,000 eyeballs thing), and I’ve found that free is a great way to do that. Free costs the readers and me nothing, but as an author the return is priceless.
I decided that since Her Dear & Loving Husband was the first book in the trilogy, I would set it to free hoping that readers who enjoyed it would be willing to pay for the second and third books. If the book is on the free bestseller chart, then at least I have a chance to get it downloaded onto e-readers; whereas readers might not have known about it if it stayed in limbo on the paid charts.