Cult of Mac sent me an email offer for a free month of Audible with two free audiobooks. I was able to use it, even though I'm a lapsed Audible member.
https://deals.cultofmac.com/sales/fr...p-2-free-books
You do have to sign up for their newsletter, though I don't know if they can tell if you're a Mac user or not.
They also want you to share on social media, but I chose the option of not having any social media, which lets you just copy the link to share via email (but doesn't actually require you to email it to anyone).