It has always been, and always will be, about convenience first.
Pre-Spotify and pre-bandcamp, getting music you could play on multiple devices was hard. Piracy was the only reliable way you could have the same songs on your walkman, your mp3 player, your phone, and your computer.
Bandcamp is nice, in that it offers DRM-free music in high quality, but Spotify offers raw, unadulterated convenience.
Pre-Spotify and pre-bandcamp, getting music you could play on multiple devices was hard. Piracy was the only reliable way you could have the same songs on your walkman, your mp3 player, your phone, and your computer.
Bandcamp is nice, in that it offers DRM-free music in high quality, but Spotify offers raw, unadulterated convenience.
And Convenience is King.