People mostly aren't willing to pay for music exclusives. (Tidal tried to make a go of it, but that hasn't really gone well for them). People are willing to sign up for Amazon just to watch The Grand Tour or whatever, but there's no real analogue to that in the music world. Maybe because a single album or even a single artist is too "small" to make an impact?

Compare the fact that people used to pay for (individual!) cable TV channels, but there was no equivalent for radio - a few people did pay for satellite radio, but I don't think you ever got people signing up for the premium package in the same way they did on TV.