Facebook comments, ads don't sway most users: poll By Alexei Oreskovic - http://www.reuters.com SAN FRANCISCO (Reuters) - Four out of five Facebook Inc users have never bought a product or service as a result of advertising or comments on the social network site, a Reuters/Ipsos poll shows, the latest sign that much more needs to be done to turn its 900 million customer base into advertising dollars. The online poll also found that 34 percent of Facebook users surveyed were spending less … [Read more...]