[shubb]

Or old content.

Spotify provides access to a huge back catalogue and although it probably reduces the value of some content it monetises other old content that was basically dead.

Currently Netflix has a tiny library, when you take into account 50 years of film ripe for rediscovery.

Anyone know what the blocker is?

[tomcam]

The blockers are that old content that people are willing to pay for is more expensive than you think (tons of competition right now), and that rights management is incredibly expensive and Byzantine even for the big companies. To take the simplest example, what do you do when an attractive property is owned by a company that went out of business, or that can't be reached? And that's just the easiest scenario.