The old twitch prime ('turbo') no longer exists.
Am I happy that I suddenly have a free sub? It's nice to have but it worries me that more and more services are bundled until the point where Amazon Prime is no longer a luxury but there is so much bundling where the price isn't worth it for any given service but there's no alternative.
If it heads down that route then it'll take something drastic to break it up. It took the internet to break up cable tv bundling.
Rest assured, that is precisely their goal:
"Our goal with Amazon Prime, make no mistake, is to make sure that if you are not a Prime member, you are being irresponsible," - Jeff Bezos