I don't know if this link has already been posted, but the article is quite insightful.
Some quotes from it:
But appearances can be deceiving. In fact, as I read the situation, we are witnessing the beginning of the end of Facebook. These aren't the symptoms of a company that is winning, but one that is cashing out.
Indeed, 11 years ago this week, when AOL announced its $350 billion merger with Time Warner, I was asked to write an OpEd for the New York Times explaining what the deal between old and new media companies really meant. I said that AOL was cashing in its over-valued dotcom stock in order to purchase a stake in a "real" media company with movie studios, theme parks and even cable. In short, the deal meant AOL knew their reign was over.
Unlike a public offering of shares, this private offering to Goldman's clients doesn't obligate Facebook to come clean on its real profits. It doesn't have to submit to standard accounting practice, or indicate how well it's really doing or isn't doing. It gets to remain in the safe cloud of hype that protects all such ventures until they either make a real profit or die trying.