The image of literal sheep inside tiny barbed wire fences is a bit extreme but I do feel the same problem. I want to be able to purchase something then access

The image of literal sheep inside tiny barbed wire fences is a bit extreme but I do feel the same problem. I want to be able to purchase something then access it reliably without re-purchasing it. I think the main problem is that digital copy/distribution is so cheap relative to content creation that the existing model of bundling those costs to emulate the inherent properties of physical distribution naturally leads to walled gardens. OPDS seems to address only a small portion of the problem by describing a how publishers should host their content in a standard way that makes it easier to access/index. Am I missing something in the specification?