how about when I have the game but cannot play it on my current machine because the OS doesn't support it any longer? Example, many games require Rosetta to be

how about when I have the game but cannot play it on my current machine because the OS doesn't support it any longer? Example, many games require Rosetta to be available on OS X but that support was dropped ages ago. If they can modify at any time my usage of the game then as consumers why would we not simply modify the situation to never pay them for their products?