Most people don't know when or if a film is going to be available (and won't care). They're more likely to buy what they see is available and not go digging for the vaulted titles on eBay and/or go nuts when they come out again (that's only a small percentage). I just think there some people there that haven't progressed from their old theatrical re-release cycle.
Translation: Old guys stuck to old ways, not greedy.