They didn't ask the users...
The users of Facebook are the advertisers and people making money from Farmville etc.
The people who think they are the users are actually the PRODUCT.
Since when does a farmer interview the sheep?
The latest data on social networks from the American Customer Satisfaction Index (ACSI) shows Facebook is about the least popular social network – but that doesn't seem to stop people using the site. "Even with improvements across the board, e-business—and social media in particular - doesn't do well in terms of user …
Sort of like using Windows.
There's really no competition in social networking. Twitter, Linkedin, Tumblr, Pinterest and so on are all different enough from Facebook they aren't really replacements. The only direct competition is Google+, but that's a bad joke that apparently Linus Torvalds is the only regular user of.