[sidewndr46]

PBS is "free to air", meaning it can be redistributed verbatim within the US with minimal delay without permission from the parent company.

As a result, they have no incentive or negative incentive to advertise that other stations carry their content.

[johnsanders]

Content created by PBS and its member stations carries a copyright notice and cannot be legally redistributed without permission.

[chiefalchemist]

Not so. The local PBS stations do fund raising / pledge drives. It's definitely in PBS' interest to push people to local PBS stations.

Or did I misinterpret your point?