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"-- Most Linguaphone, Berlitz, Rosetta stone etc.. other courses aren't accredited by the government but does it mean they are fake? or of less value? No."
Their value is very limited (according to extensive research in ELT), but they are sold to people who have the capability to research what they are getting and make informed decisions.
A university selling unaccredited degrees is essentially the same, except that the buyer is investing quite a lot more in terms of both money and energy, not to mention hopes that it will pay off later on.