Trying not to leave any money on the table is exactly the approach that reliably kills off nostalgia income streams.

Picking off some low hanging fruit while demonstrating provable restraint can result in a huge money stream that goes on and on. But when the mindset "it's good, but it can be better!" becomes dominant (e.g. through market dynamics, being publicly traded means that ownership perpetually shifts to those who think that income sources could be squeezed just a little harder, or much harder, actually), it quickly turns sour. And when it flips from beloved to "why throw money at those greedy $expletive,plural" it flips hard, and forever.