Was Premium, now Free
I used Spotify for around a week for free, and promptly paid for a Premium subscription. I found that after a week, however, that the experience while using the Free version was so very close to Premium, there was no value for money in paying for a subscription.
Now, I know the reduction in advertising is a good thing for my listening time, but for 30 seconds every half an hour, I can afford it. £10, however, pays my phone bill for a month.
Guess which loses out.
Spotify are a victim of their own success; They can't drop the quality of service for the "freetards" as they'll just leave, and the paid service has nothing to offer worth £10 a month which the Free service doesn't have.
Too popular to succeed.