As TeMPOraL correctly pointed out, it is not content users voluntarily signed up to receive -- its content that they "liked."
Facebook is following the same game plan Google has used: give away free traffic at incredible volume, then start charging for it.
I believe Facebook's mistake is that they should have some sort of transparency in regards to why they are charging what they are charging. In Google's case, what you are charged is based on what your competitors say its worth (ok, not really but that is Google's story and pretty much everyone believes it.) From what I see, Facebook is just throwing out a number which page owners see as extortion.
Facebook is following the same game plan Google has used: give away free traffic at incredible volume, then start charging for it.
I believe Facebook's mistake is that they should have some sort of transparency in regards to why they are charging what they are charging. In Google's case, what you are charged is based on what your competitors say its worth (ok, not really but that is Google's story and pretty much everyone believes it.) From what I see, Facebook is just throwing out a number which page owners see as extortion.