This isn't that unusual at all. Many pop stars make a lot of money with private concerts for very rich individuals or companies. Even actors like Leonardo DiCaprio get paid to vacate on the super yachts of rich people from gulf states who then show off the celeb and get attention for themselves.

My personal hypothesis for why pop music seems so odd, BORING and promoting luxury life instead of dealing with people's every day problems and heart aches. The Spotify users don't pay their bills, it's the high profile fans among the billionaires who do. Also their parties are fancier I guess.