That isn't 'revenue' that is Federal tax dollars taken upon threat of jail from all federal taxpayers to support a liberal radio and TV network.

"The CPB's annual budget is composed almost entirely of an annual appropriation from Congress plus interest on those funds."

Your donors are too cheap to provide the money actually needed so they get the Congress to appropriate it.  

Liberals prefer taking tax dollars from everyone to support their own narrow interests.  

The "Corporation for Public Broadcasting" (CPB) is just one of the more egregious forms of corporate welfare that the liberals prefer.