We just got through one of the busiest shopping periods of the year and retail marketers now have a bevy of consumer data at their disposal. Historically, Black Friday marked the kickoff to the holiday shopping season, but this year was different with more retailers starting their discounts earlier and opening on Thanksgiving day. Reuters noted that, according to ShopperTrak, Black Friday sales totaled about $12.1 billion, which was down slightly from last year. However, online....