Survey: Facebook users concerned about privacy, ads

July 21, 2010 3:25:45 PM PDT
Facebook hits a major milestone- but that doesn't mean all those users are happy with the social networking site.Facebook reported earlier this week it now has over 500 million users. However, a new survey conducted by the University of Michigan found the social network ranked lower than both the airline industry and the cable TV business in customer satisfaction. Those industries have both suffered public relation hits in recent years.

Facebook users said they were most concerned about privacy and advertising on the site.