See also Phil Greenspun's experience: http://blogs.law.harvard.edu/philg/2010/03/19/groupon-marketing-results/ http://blogs.law.harvard.edu/philg/2010/03/19/gro

See also Phil Greenspun's experience: http://blogs.law.harvard.edu/philg/2010/03/19/groupon-marketing-results/ http://blogs.law.harvard.edu/philg/2010/03/19/groupon-market... "Starting just after 6 am, Groupon sent out emails to its roughly 200,000 Boston subscribers. I knew that there might be a problem when I checked a few minutes after receiving my email (I am a subscriber). They'd already sold 30. By 11:00 am, they'd sold more than 2000. We finally had to beg them to shut it down at 2600 (we could have set a limit initially but didn’t think to)."