And now this via email:
This July 15th is Prime Day, a one-day shopping event only for Prime Members with more deals than Black Friday. To sweeten the deal, if you play any station, playlist, album, or song in Prime Music on July 15th you will be automatically entered for a chance to win up to $25,000 in Amazon Gift Cards.
(I apologize if it was already posted...I looked and searched but did not find. If it was, I'll delete this post.)