Advertising revenue is in decline for all media, both for broadcasters and newspapers.
However, for the public broadcaster, this is of special importance. To provide something different in order to stand out from private broadcasters, it must have a specialization, as Mr. Arnold mentioned. Eliminating or reducing the dependence on advertising revenue can provide a different direction for programming. If your content is intended to attract the attention of, and be sold to, companies, that's one thing. If you have another objective, the programming can change and it's possible to create a different approach.