> He's made his billions on the backs of builders, the musicians who can record music all day long but will be lucky to receive pennies for a million listens.
Ah, you surely mean recording companies and copyright holders that take up to 70% of Spotify's revenue and pay out pennies to artists. Why don't you ask those companies where all the money is going?
> Why can't he share his largesse with the builders who make it possible for his service to exist?
Well, he is sharing it. At IPO Spotify disclosed that had paid "$9.7 billion in royalties to artists, music labels and publishers since it launched in 2006." [1] The thing is, Spotify doesn't have direct contracts with artists (and can't afford to for fear that the Big Four[2] will pull their content). So the question is: where did those billions go?
Let's read the article you're commenting on (emphasis mine):
--- start quote ---
Spotify pays the major record companies a 52% share of all net receipts attributable to streams of their artists. This was a figure the parties agreed to during negotiations in 2017, and it’s believed to have remained unchanged since.
According to Spotify’s Q2 results, the firm generated €1.89 billion ($2.05 billion) in the three months to end of June. We can therefore broadly assume that 52% of this money, or $1.07 billion, is being paid in recorded music royalties to labels and distributors, who will carry a portion of that over to their artists.
--- end quote ---
The article then continues being disingenuous pretending that 100% of the money that Spotify pays out goes to artists and that Spotify is solely responsible for that money.
So what is that "portion that labels and distributors carry over to their artists"?
Oh, look, only 12% of music revenue goes to artists [3] But obviously, it's the sole responsibility of Spotify (and Amazon, and Apple), and not of the Big Four that hold the music world hostage.
[1] https://www.cnbc.com/2018/02/28/how-spotify-licenses-and-pay...
[2] https://en.wikipedia.org/wiki/Music_industry#Consolidation
[3] https://www.techdirt.com/articles/20180819/00051140461/only-...