I'm a non-prime member and this is what is showing up for me. Not sure if prime members get any added benefit.
T&Cs:
This promotion is valid from 23 December 2020 00:00 AEDT to 21 January 2021 23:59 AEDT, for new members of Audible in Australia or New Zealand who sign up for an Audible membership at https://www.amazon.com.au/gp/product/B0744FTMQJ. With your membership, you’ll get one credit per month for $0.00/month, for the first 2 months. After the first 2 months, your membership will renew automatically at the regular monthly price, currently $16.45. Cancel anytime. For this offer to apply, you must sign up for your Audible membership on amazon.com.au. If you sign up through other websites (e.g. audible.com.au, or amazon.com) the offer does not apply. This promotion may not be combined with other offers. Limit one per customer and account. Audible account required. Other terms and conditions apply, including Audible's Conditions of Use at https://www.audible.com.au/legal-terms/Conditions-of-Use?mod…. If you violate any of the terms or conditions, the promotion will be invalid, and the offer will not apply. This promotion may not be combined with other offers. Audible reserves the right to modify or cancel at any time. If your credit card is declined, the offer will not apply. Terms prohibited by law shall be void without prejudice to the remaining terms.
Nope, shows the same thing…