Anyway, to everyone else, since I am both a fairly unknown indie artist as well as an indie record label with music on the iTunes Music store, I have some actual insight into all of this. The offer I received was simply, Apple has a new streaming service "Apple Music" and I have the option to add all of my current iTunes Music Store music to this new streaming service with the condition that I won't get paid for the first 3 months of streaming due to the free trial. Me opting in or out has no affect on my music releases that are currently in the iTunes Music Store. Simple as that. I opted in since it's worth it for me to get my music on Apple's streaming service in case it does take off; though I generally don't like streaming services because I don't make as much money...
Also, I've made more money selling through Apple's iTunes Music Store than any other service (e.g. Amazon MP3 Store, Google Play, Xbox Music, etc.) And don't even get me started on Spotify! As I mentioned in another thread here, for every song of mine that sold on the iTunes Music Store (of which I received 70 cents per song) that same song streamed 50 to 100 times on Spotify... and I have yet to see a single penny in over 2 years from Spotify! Yes, I'll be pulling all of my music from Spotify very shortly here.
EDIT: One other thing I want to clarify is this, I don't think people get how the 3 month trial works, especially with relation to an indie artist. It's not a 3 month free trial starting in June and nobody gets paid no matter what! It's a 3 month free trial whenever a particular user signs up for the Apple Music streaming service and it depends on what he/she actually listens to.
So, for example, lets say Joe Schmoe decides to finally sign up to Apple Music on September 1st. He now has a 3 month free trial until the end of November. During that time all his "streams" are nothing but U2, AC/DC and Neil Diamond. So those 3 artists (or rather, their Record Labels) won't get paid for Joe's streaming during the months of September through November. Do you really think I am worried about that as an indie artist? Really?
On the flip side, say one of my fans (yes, I do have some) signs up to Apple's Music stream and the first thing they do is look for my songs. If I had opted out, my fan can't stream my stuff and I don't make any money anyway (and then my fan may forget about me and move on.) But if I opted in, which, again, I have, then my fan, who has already most likely bought my music in the past, is happy to see I am also part of the streaming service and now looks forward to what I do in the future. It's definitely a win/win for any indie artist to opt in and not to worry about the 3 month trial. It's really not that big of a deal.