Data from Nielsen Online, which measures Internet traffic, found that more than 60 percent of Twitter users stopped using the free social networking site a month after joining.
I can understand why people drop out it after awhile, it's extremely time consuming. I wonder about all these people Twittering. Do they have a job? Do they work for employers who don't mind that they spend time Twittering? I've tried to follow a few people and discovered that I just don't have the time. There are just too many other things to do and I just don't have the time to Twitter. It seems other people are feeling the same and Twitter may follow the path of many other fads.
But Martin said a retention rate of 40 percent will limit a site's growth to a 10 percent reach figure over the longer term. "There simply aren't enough new users to make up for defecting ones after a certain point," he said in a statement.