I posted on DDMS comments this also gets a 3 month free trial of amazon music unlimited here is the email they sent....
Dear Amazon Customer,
As a thank you for purchasing a new Amazon Echo device, you are eligible for 3 months of Amazon Music Unlimited.
Start your free trial today for unlimited access to tens of millions of songs and thousands of playlists and stations by your favorite artists. With Amazon Music, you can request by lyrics, let Alexa pick the music for you, or set a music alarm to wake up to your favorite song or playlist.
To activate your Amazon Music Unlimited subscription, click the button below and select the “Individual Plan” on the signup page or just ask, "Alexa, start my free trial of Amazon Music Unlimited" on your new device.
Your credit* has already been applied to your account.
* Promotional credits will be deducted from your account after your free trial.