Thanks for the heads up!
I got the promo - now to figure out what comics omnibus to use it for to make sure I get the most out of my credit!
Could've sworn I've used an audible trial in the past, but the promo worked for me. Decided on the Art of Alien: Isolation. Really wanted Blade Runner: 2049 to work though.
As long as it hasn't been within the past 3 months you're eligible for this one. I've had a trial before, too, but it was years ago.