<p>SAN FRANCISCO (Reuters) - Retired schoolteacher Donald Hovasse signed up for Twitter about a year ago at the urging of his daughter. He lost interest after trying the service a few times and finding lots of celebrities but few of his friends using the online social network.</p><p>"I didn't really get the point of it at all," said the Las Vegas resident. "Most of them were people I wasn't interested in hearing what they had to say anyway." He said, however, that he does check Facebook every day to see what his friends are up to.</p><p>Hovasse's experience highlights a risk for investors as Twitter Inc marches towards this year's most anticipated initial public offering in the United States, expected to begin trading on the New York Stock Exchange in mid-November.</p><p>According to a Reuters/Ipsos poll, 36 percent of 1,067 people who have joined Twitter say they do not use it, and 7 percent say they have shut their account. The online survey, conducted October 11 to 18, has a credibility interval, a measure of its accuracy, of plus or minus 3.4 percentage points.</p><p><a href="http://www.reuters.com/article/2013/10/20/net-us-twitter-users-idUSBRE99J03920131020">Keep reading...</a></p><p>Read also:</p><p><a href="http://www.vcpost.com/articles/16752/20131020/twitters-attrition-rate-challenge-investors.htm">Twitter&#039;s attrition rate is a challenge for investors</a> (Venture Capital Post)</p><p>Explore: <a href="http://news.google.com/news/more?ncl=dgHg30eJRtFrhIMn7QX-zfewv997M&ned=us">8 additional articles.</a></p>