"The New York Times reports that 1.5 million Pandora plays translate into a measly $1,652.74. On Spotify, 131,000 plays last year netted just $547.71, or an average of 0.42 cent per play. For the sale of a 99 cent mp3, an artist might make 7-10 cents after appropriate deductions to other earning parties, such as the record label. So 1.5 million sold mp3s would net an artist $150,000 before taxes if they received the upper end of this projection."
Via Nuno Costa Moreira