Full disclosure - I am an audio book narrator and do pay to use this site to (hopefully) generate reviews. So, the idea is that you request the codes from the narrator or author. What we see is a link to your previous reviews, if any, so it's good to have at least one review posted to Audible. It's at the narrator/author's descretion to send a code for a free copy. Personally, I only deny those reviewers who clearly don't care or write really crappy reviews like 'it gud.' I prefer honesty so if you review stuff, I approve the code and you get a free book or box set or whatever. If you want a free code to get a book to review, I have plenty of books I haven't posted and would be glad to send you one - again you are free to be honest, I'm not begging for good reviews. There are plenty of people who hate my voice and that's fine. (If this belongs elsewhere, let me know, but I didn't see an audio book sub or a free stuff one.)