That's not to say social networking sites haven't found success in charging members for some services.
The disruption prompted angry BlackBerry users to vent their frustrations on social networking sites like Twitter.
FORBES: BlackBerry Service Restored As RIM Co-CEOs Vow To Do Better
Communication history, instant messaging and updates from social networking sites are all readily available.
ENGADGET: Samsung debuts new Galaxy lineup, refines naming strategy along the way
Facebook and other social networking sites reflect these changes but they also enhance them.
FORBES: Why Negotiators Care That 2.7 Million People Turned Red for Marriage Equality
Security experts said it makes sense that cybercriminals are turning to social networking sites.
All of which, they can send to their friends and family through social networking sites.
Tributes poured into social networking sites as friends expressed their shock at the shooting.
Children will only be allowed to use the social networking sites if adults are present.
Although social networking sites are popular, they are not yet attracting high advertising rates.
Facebook and other social networking sites were very much a victim of this skepticism.
FORBES: Just Because Facebook Ads Don't Work For GM Doesn't Mean They Don't Work
Internet-based social networking sites like Friendster and MySpace.com have changed the way people connect.
The lonely hearts are preyed on in chat rooms, dating sites and social networking sites.
Like the other social networking sites, it derives most of its revenues from advertising.
FORBES: Social Networking Site Similar to Facebook Dedicated To Cancer
Also, unlike the other social networking sites, Cancer.im allows for donations to be made.
FORBES: Social Networking Site Similar to Facebook Dedicated To Cancer
Like other airlines, JetBlue approached social networking sites by slowly scaling up its presence.
The gaffe was picked up by fans on social networking sites such as Twitter.
Everyone knows that evidence from social networking sites comes in handy for lawsuits and divorces.
FORBES: Judge Orders Divorcing Couple To Swap Facebook And Dating Site Passwords
To ramp up your positive Web mentions, start with blogs and social networking sites.
As social networking sites open to developers, can they keep users' private information closed to prying hackers?
Russian blogs and social networking sites celebrated the incident as a "miracle" and the pilots as "heroes".
But they're buffing up how they serve vacationers by acquiring social networking sites that focus on travel.
Those numbers suggest that the social connections on Facebook remain the strongest of the social networking sites.
FORBES: More Employers Using Social Media to Hunt for Talent
It is easy (and cheap) to create a page for your brand the countless social networking sites.
Pupils vented their anger on social networking sites, with some calling for the exams to be re-staged.
Others blame the look-at-me-I'm-so-special culture bred by egocentric social networking sites such as Facebook, My Space, and Twitter.
What makes social communities like these different from the standard social networking sites that we know and love?
FORBES: How Social Communities Are Changing Online Interaction
Another part of Palin's media strategy that faltered, according to communications pros: her use of social networking sites.
But only 10 percent of companies had specific polices to deal with social networking sites, the survey reported.
CNN: Workplace rants on social media are headache for companies
Those requirements are not yet built into the law with regards to Google searches and social networking sites.
Smartphone devices, which have PC-like functions and links to social networking sites, have reawakened consumers' appetite for gadgets.
应用推荐