Spotify is managing to stay ahead of the pack – that pack including the recently-purchased Beats Music – as it hit its 10 millionth paid subscriber, doubling the number of premium customers it had just a year and a half ago today. It took Spotify four years to land its first five million, so to double its paid subscriber count in just a year and a half represents a massive accomplishment, and evidence of growing support. Though profits still remain hard to come by, 10 million users is nothing to scoff at.