So it’s with a sense of real pride and excitement that we can announce a new milestone today, having welcomed our millionth paying subscriber to the service. It’s a testament to our fantastic users who continue to support us and spread the Spotify word, either by telling friends or sharing some of the 200 million playlists that you’ve put together so far."
Source: Spotify blog, 8th March 2011
Note - "Spotify is currently only available in Sweden, Spain, Norway, Finland, France, the Netherlands and the United Kingdom. In Austria, Belgium, Estonia, Germany, Greece, Italy, Poland, Portugal, Romania and Switzerland the Premium service was offered until July 2009, but never the free version. Currently only customers with credit cards issued in one of the above-mentioned launch countries can buy a Premium account."