I've been giving away my books ever since my first novel came out, and boy has it ever made me a bunch of money.

When my first novel, Down and Out in the Magic Kingdom, was published by Tor Books in January 2003, I also put the entire electronic text of the novel on the Internet under a Creative Commons License that encouraged my readers to copy it far and wide. Within a day, there were 30,000 downloads from my site (and those downloaders were in turn free to make more copies). Three years and six printings later, more than 700,000 copies of the book have been downloaded from my site. The book's been translated into more languages than I can keep track of, key concepts from it have been adopted for software projects and there are two competing fan audio adaptations online.

What is certain is that every writer who's tried giving away e-books to sell books has come away satisfied and ready to do it some more.