[muchcomment]

There's a 30/70 split for most online music services (both streaming and purchase). The major labels negotiate to get a better deal, but for most artists there's a distribution fee of 30%. I don't have the details for the Apple Music agreement, but I know both Spotify and Tidal takes a 30 % cut of the revenue. I expect Apple Music to follow the same revenue split as iTunes.

Also: Spotify's freemium model pays out about 1/20 compared to Tidal premium-only model. If Apple Music is a consumer success, it (and other premium-only services) will be a much more attractive option for artists than Spotify.