I've done this myself and can confirm it works with a free trial (cancel before first payment).
I've had an audible trial before and signed up for a new one and it worked.
You must do the following:
- Log in / sign up to Top Cashback
- Go to the amazon subscriptions top cash back page (linked)
- Follow the link for an Audible subscription
- Sign up for an audible one month free trial
- Immediately lodge a claim:
Please Note: Amazon Subscription services Cash Back is available via Cash Back Redemption. Upon completion of your subscription service, you must visit our Customer Care section and Lodge a Missing Claim. Once your subscription is completed please visit our Missing Cashback Claim Section (Untracked Claim) to submit details.
By continuing to Amazon Subscriptions, you understand that you must complete our Validation Process in order to receive Cash Back.
You will be required to submit some details to confirm your transaction. Transactions will only become payable after confirmation, and may take 4-6 weeks to show. Cash Back is paid by TopCashback, and any inquiries should be directed to TopCashback, and not Amazon Subscription Services. A maximum of ONE Cash Back redemption will be allowed per listed subscription, per member. By continuing to Amazon Subscriptions, you agree that you understand the above.
- Wait (for me it took over a month but they still paid after I had cancelled my subscription)
- Free $15!
Don't forget to cancel subscription before it renews (if you do forget ask their support they are very good and will offer you a refund)
It might be my incompetency, but where is the redirect link to Audible?