I have a lot of my playlists available offline, to save bandwidth and battery for on the road.

There is a reason this company has been banned from the major app stores.

They are not paying the artist for the music they play.

So they are stealing from people like me.

Please enlighten us to the proportion of money that goes to the artist vs. how much goes to the record label.

10% goes to the artist, maybe? Even less?

I'm sincerely curious, I'm buying an album at iTunes right now

Does it matter? The artist and label legally agreed to a contact between the two parties. Sure you don't like it and think that the label is making more money than you think it should, but the artist legally allowed that price difference to happen.

Because the content on Spotify is all legal?