Spotify a customer base of one million paying subscribers across Europe, and by September 2011, the number of paying subscribers had doubled to two million. In August 2012, "Time" reported 15 million active users, four million being paying Spotify subscribers. User growth continued, reaching 20 million total active users, including 5 million paying customers globally and 1 million paying customers in the United States, in December 2012. By March 2013, the service had 24 million active users, 6 million being paying subscribers, which grew to 40 million users (including 10 million paying) in May 2014, 60 million users (including 15 million
Million service units would do so with 10% fewer MSUs. The lower MSU rating means lower software costs, providing an incentive for customers to upgrade. However, as software costs are not linear with MSUs, decreasing or increasing MSUs will not show a proportional change in software costs. The "least expensive" MSUs will be added (with increased MSUs) or removed (with decreased MSUs). For example, a 10% increase in MSUs will result in a software cost increase of less than 10%. How much more (or less, if reducing MSUs) depends on numerous other factors. Million service units A million service units (MSU) is a