I'd heard about some authors complaining about Audible's return policy. Now I've run into an item on thebookseller.com entitled:
Authors Guild demands changes to Audible's returns policy and the link in that item to
Sign Our Letter and Tell Audible to Stop Charging Authors for Returns.
I do have one acquaintance who has been using this to listen to multiple audiobooks for no cost. As she said, "no one is being hurt."