Sudden bleeding in the brain can cause a hemorrhagic stroke. The bleeding causes swelling of the brain and increased pressure in the skull. The swelling and pressure damage brain cells and tissues.
That means 651 million accounts â about four times the number of active Twitter users â have been registered and then been abandoned by their owners. Those 651 million accounts are Twitter's dark pool of users: the people who signed up and didn't like it. Their accounts continue to exist, unused, according to Twopcharts. We asked Twitter to tell us its total number of registered users, but the company declined to comment. Here's Twopcharts' data as of Nov. 5:
Twitter Sucks at Converting Awareness to Usage. Known by 87%, just 7% of Americans use Twitter. Thus, fewer than one in 13 Americans who know about Twitter, actually use Twitter. Compare that ratio to Facebook, where 88% have heard of it, and 41% have a profile (a conversion rate approaching 50%).