"Spotify will soon be shifting towards a premium-only, ‘gated access’ model, according to several sources speaking in confidence with Digital Music News over the weekend."

Impending deadline for critical major label deals to be renewed is said to be forcing the change in their business model. Possible approaches include
- Certain releases will only be available to paying Spotify subscribers
- Offering certain releases for an extremely limited time to non-paying users
- Non-paying users would only have access to one or two songs from a high-profile album

“They want the free users to feel like they’re missing something, not just forced to listen to ads”

http://www.digitalmusicnews.com/2015/08/08/spotify-preparing-to-offer-premium-only-content-sources-say/