Originally Posted by HarryT
Sony tried the "expiring content" DRM model with the original Librie - it was a disaster. People just don't want content which disappears.
Then why do you think that people will pay for DRMed content?
DRMed content "disappears" after a while simply because the format it's is no longer supported. Or, as the people who wasted their money on Google Video found out, when the DRM provider goes out of business.