[madsmith]

I would think it has to do with the IP owners using the likeness of the actors to continue to market the show year after year.

[scarface_74]

Does your employer get to use code you wrote after they pay you? Do they get to market features you worked for after you leave?

Do landlords get to collect rent on buildings after the architects are paid to design it?

[aezart]

Both of those things are also bad.