I've already explained it Jack, but since you asked again with more questions:
PBS is a public broadcasting station which has specialized in educational and government programs. PBS has been subsidized by the taxpayers for years and years. They have no profit, not only do they have their telethon they are also subsidized by the government. This relates directly to what PEG is all about. Public/educational/government programming, not many people watch these programs thus not many sponsors, thus not much in income. Their is a direct relation between the two when you consider the genre that each broadcasts.