Apologies if this has been covered (I couldn't find anything via search which surprised me). I use Amazon Music as my primary Sonos source and I received the following notification from Amazon UK this week;
*****The Amazon Music Storage subscription plans (free and paid) are being retired, and new subscriptions are no longer accepted.
Effective April 29, 2018, subscription renewals will no longer be available. Current paid subscription members can upload and store up to 250,000 imported songs in supported file types while their subscription is active.
Important - Upcoming Changes to Music Storage Plans
Note: These changes only impact music you’ve imported. Music purchased from Amazon (MP3s or AutoRip from CDs) remains securely stored for playback and download.
Paid 250,000 Song Storage Plan
As of April 29, 2018, storage plans can no longer be renewed.
While your membership is active, you can continue to upload music.
To play or download your previously uploaded songs after your subscription expires, go to Your Amazon Music Settings and select “Keep my songs.” This needs to be done before your subscription expires.
After your subscription expires:
There is no option to restart your subscription.
Additional music can’t be uploaded.
All Amazon music purchases remain securely stored for free*****
Having read this a few times, I'm still unsure whether users will be able to stream previously uploaded music after the expiry date. The way I'm reading it is telling me that users will only be able to stream music that has been purchased from Amazon. I've selected "keep my songs" as instructed.
I thought I'd post this regardless as a heads up for those that use this service for their Sonos. I've spent days/hours importing music and creating playlists in Amazon for my Sonos.
I'll be contacting Amazon UK for clarification but I'd also appreciate the thoughts of other users.