One can find many of those films on YouTube to rent for $2.99-$3.99, which is cheaper than Blockbuster used to be (adjusted for inflation) and much more convenient.
To be clear: I love this business model. This is how I watch films for the most part. But while lots of films are available this way, just as many are not. And many of these are not some obscure indie film - they are acclaimed mid-to-high budget Hollywood films that, for no good reason, are trapped in IP purgatory.