That goes without saying, content providers are shooting themselves in the foot with an atomic shotgun with the current fragmentation and lots of content is not legally available anywhere.
"Tragedy of the commons" is when a bunch of private interests use a publicly-owned resource in a greedy way and end up ruining it for everyone. I don't think this quite applies here, but I don't know of any other term to call it because I can't think of any non-internet analogies.