"So let’s engage in a bit of speculation instead: Why would Amazon come out with a digital music service that’s just like lots of other services, but not as good?Amazon Launches Prime Music Service without Universal Music Group | Re/code
The most obvious conclusion is that Amazon doesn’t think its Amazon Prime members, who are already paying between $79 and $99 for the shipping service, will compare Prime Music to other subscription music services, because those services don’t have many subscribers."
Thursday, June 12, 2014
Amazon Launches Prime Music Service without Universal Music Group | Re/code
Check this Amazon page for more details