Which retailer set a Guinness World Record in 2019 for analyzing the largest dataset of customer purchase behavior, revolutionizing how customer lifetime value is calculated?

The retail world is full of fascinating world records - from the largest shopping malls to the most expensive purchases. But when it comes to customer analytics, record-breaking insights have revolutionized how retailers understand shopper behavior. This trivia question explores an extraordinary case of retail data analytics that set a world record and changed how we think about customer lifetime value calculations.

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Amazon, with 2.5 billion customer transactions processed simultaneously using their proprietary 'Anticipatory Shipping' algorithm
Walmart, with their 'Customer DNA' system tracking 1.8 billion shopping journeys across 11,500 stores worldwide
Alibaba, during Singles' Day, processing 1.3 billion unique customer profiles in real-time personalization
Target, whose 'RedCard Insights' platform analyzed 970 million customer interactions to predict future purchases