The Impact of StumbleUpon Sean Li Internet March 20, 2010March 21, 2010 1 Minute That spike is caused by StumbleUpon. Thanks for stumbling! Edit (3/21/10): Oh, but wait! See the stats for the next day. 30.410654 -97.774703 Share this:TwitterFacebookLike this:Like Loading... Published March 20, 2010March 21, 2010