It’s easy to see why Amazon and Pandora want to take on Spotify and Apple (AMZN, AAPL)

It looks like the streaming music world is about to get even more crowded: Recent reports say that both Pandora and Amazon are close to launching new streaming services built to compete with the likes of Spotify and Apple Music.Given that Pandora and Amazon already have music streaming platforms, that might sound weird. But as this chart from Statista shows, there’s good reason for them to change things up. According to data from the IFPI, the amount of annual revenue driven by music strea