Which pricing strategy was recognized by Guinness World Records in 2011 when an online retailer set the record for 'Most changes to the price of a product in a 24-hour period'?

The retail world isn't just about everyday sales and marketing - it occasionally intersects with the extraordinary realm of world records! This trivia tests your knowledge about a fascinating pricing strategy that landed in the Guinness Book of World Records. Think you know about extreme pricing approaches that made history? Test your retail expertise with this challenging question!

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Dynamic pricing algorithms that changed prices 2,533,319 times in 24 hours
Loss leader strategy with the world's highest recorded discount percentage of 99.97%
Bundle pricing that created 1.2 million unique product combinations in a single day
Penetration pricing that dropped a luxury product from $10,000 to $9.99 in sequential reductions