I am certainly enjoying my Tidal subscription - I am currently sitting on the loveseat with my beautiful bride, streaming some old Jethro Tull that I have never heard before. I can choose the albums, in the order that they were released during the band's career. Not only that, there is a great simple biography with hotlinks to the albums, regarding the band. I have no idea who writes the biography - it could be scammed from wiki, for all I know. I do know that it is very useful and interesting, to me. Most of the artists/bands have this information associated.
The offline function is pretty sweet, too, and works well with my Nexus 5 and the Android app.
Now, I am no jazz aficionado, but when I search under that genre, especially for specific artists, I find many, many selections available - definitely more choices than what I could afford if I tried to purchase hard copies of the music.
As far as the politics and the financial remuneration to the artists, I am a bit undereducated, so will refrain from comment. All I know is that there are probably some really smart people on both sides of the argument, each with their own goals and interests in mind. I also believe that there are still people who genuinely have others best interests in mind - I refuse to believe that our society has become completely immoral, regardless of what the media/internet portray. We just like car crashes, fires and train wrecks, for some reason, and that is what is often pandered to. After all, the media has a product to sell as well.
I will give Jay Z the benefit of the doubt and will trust that he intends to support fellow artists, until he shows otherwise.