What happens when you press play on a music streaming service? It depends on the service, but in any scenario many different parties end up splitting fractions of a penny. Here we look at Spotify and Pandora, two of the most popular music streaming services in the United States. Spotify had 4.7 million subscribers in the U.S. at the end of 2014. Pandora has about 80 million monthly listeners, nearly all in the U.S. And we look at typical streams on both services. Spotify has both a free and paid tiers. Pandora gets most of its streams from its free tier. These numbers reflect the royalties that can be expected from a typical stream.