I think that the main problem is that companies keep getting revenue even if actors don't. Book writers don't stop earning money just because they wrote their book 5 years ago, and yes, they don't win money for reselling, but companies like Amazon and their editorials will keep earning money because of their work, so why shouldn't the writers earn money?

If your work isnt being streamed or sold, well, you won't see much. But still, you signed a contract, like the old perpetual pensions.