Wait, wasn’t Twitter supposed to be dead by now?

Twitter announced yesterday that it has reached 100 million active users, with 50 million active each day. But…

• “Is Pownce the Twitter or Jaiku Killer?” (Jul. 2007)
• “Is Plurk the Twitter killer?” (Jun. 2008)
• “Will Google use Jaiku to kill Twitter?” (Jul. 2008)
• “Yonkly: The Next Twitter Killer” (Dec. 2008)
• “Facebook Opens Status API, Say Goodbye to Twitter” (Feb. 2009)
• “Facebook = Twitter Killer?” (Mar. 2009)
• “Is Google Wave a Twitter Killer?” (May 2009)
• “Is FriendFeed Facebook’s Twitter Killer?” (Aug. 2009)
• “Opinion: Facebook Lite will become a Twitter-killer” (Aug. 2009)
• “Google Launching Twitter-Killer For Gmail!” (Feb. 2010)
• “Twitter Killer? Why Your Business Should Make a Facebook Group” (Jan. 2011)
• “Quora, a Twitter killer?” (Jan. 2011)
• “Google’s New Twitter Killer” (Jul. 2011)

Related: Finally, Twitter is building stuff again