The flipside of it is that surely Amazon did not agree to continue serving the film from now and the heat death of the universe.
Regulation of these shrink-wrap agreements is the only non-insane solution to this problem. Lawsuits are too slow and too expensive, and by the time you get enough people behind one, may be an exercise in squeezing blood out of a rock.
It certainly is up to them. They negotiated a contract with the content producers that did not allow for that, and could have negotiated a different contract that did by offering more.
If they didn't want to continue serving the film until the heat death of the universe, then that's what they should have done differently, rather than just unilaterally screwing over all the buyers.
Regulation of these shrink-wrap agreements is the only non-insane solution to this problem. Lawsuits are too slow and too expensive, and by the time you get enough people behind one, may be an exercise in squeezing blood out of a rock.