Complex sentence: Business Insider, February 21,2011 retrieved October 2,2011 The deal of the day concept gained popularity with the launching of Woot.com in July 2004 (although that itself was a modified version of earlier dot-com-bubble sales by sites like uBid).
Split into simpler sentences: Business Insider, February 21,2011 retrieved October 2,2011. The One Deal a Day concept gained popularity with the launching of Woot.com in July 2004 (although that itself was a modified version of earlier dot-com-bubble sales by sites like uBid).