Spotify’s much-anticipated appearance on the stock market has finally happened, and the company is one of few tech players having a good day. Spotify pioneered the streaming model that has the music business making a comeback. The NYT has a really interesting look at who makes what in the Spotify universe. “Last year, revenues — which include sales from CDs, downloads and subscriptions to services like Spotify — in the United States grew to $8.7 billion, their highest level in a decade, with streaming accounting for 65 percent of the total.” The big question is whether Spotify can get profitable while holding off the challenge from Apple and the other big tech companies who can use streaming music as a loss leader.

+ Quartz: The company’s story is an off-the-charts success—so we’re going use charts (and a few diagrams) to tell it.