Do I even need to clarify why this is big news? read more here: https://evolver.fm/2012/04/11/spotify-launches-music-player-for-web-blogs-and-tumblr/

Some highlights of the article:

• more outlets for music streaming = more opportunities for revenue.  Now, music discovery blogs have monetary value!
• beats out competition such as Rdio
• taps into the huge Tumblr blog market – 50 million tumblrs exist! Very easy to integrate into the tumblr experience for the lay internet user!