Just received an email.
It states targeted.
Check your amazon email.
Can “cancel anytime”
Mod 7/11: Thanks to PChinna this deal is now available until 15/11 and should be available to more people. Ensure you see the "Join Audible today and receive a free Echo Dot" text after signing in to Amazon.
Thanks to Tech5 you can select 2 Echo Dots (of the same colour) for $20.