2004 Message Boards Sites StumbleUpon 
Techipedia: Tamar Weinberg
APRIL 28, 2010
In fact, you can validate that by cross checking my user ID, 102991, which should indicate that I’ve been around for a real long time (since February 2004, to be more precise). They might not be the lifeblood of your site, but they’re definitely driving more users to the network, which we hope actually helps your bottom line.
Webbiquity SMM
NOVEMBER 28, 2011
by MediaPost SearchBlog Social media sites now drive more traffic to many popular sites—including Comedy Central, NFL.com and Netflix—than Google does. Gmail and StumbleUpon are the fastest growing methods, however. That sounded low to me, so I checked some of the B2B technology client sites I manage.
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