Which mythological marketing strategy, still reflected in modern retail customer insights, did the Oracle at Delphi employ to maintain its 'customer base' of pilgrims and rulers for over 1,000 years?

In ancient mythology, heroes embarked on quests for legendary treasures. Today's retailers are on their own quests for the modern equivalent: customer loyalty. Just as mythological figures used divine insights to overcome challenges, retailers use customer analytics to understand behavior patterns. This trivia question explores how ancient mythological marketing techniques parallel modern retail customer insights strategies.

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Personalized prophecies based on observed behavioral patterns (ancient segmentation and personalization)
Seasonal discount offerings during festival months (ancient promotional calendar)
Oracle loyalty program with bronze, silver and gold tiers for repeat consultations (ancient loyalty scheme)
Competitor prophecy matching - guaranteeing more accurate predictions than rival oracles (ancient price matching)