Incentives are something most peeps in the crypto space talk about, but the masses won't do stuff because it earns them some pocket money. And I think you understood me not 100% correct. When all web3-based music would be in a single player, the masses wouldn't come to such a service. it needs - almost - ALL the music out there in a single player, including all the 'web2' music.
It is for a reason that Spotify is - finally - doing so well. It took them a decade or more, plus a LOT of money, to get where they are. They have all the music the masses listen to. None of the web3 platforms has that.