Which coffee chain created a customer loyalty program named after a character from Herman Melville's 'Moby-Dick', inspired by maritime folklore and mythology?

Throughout history, mythology and folklore have inspired countless brands and products. From Nike's winged goddess of victory to Starbucks' siren from Greek mythology, these ancient stories continue to shape modern retail experiences and brand identities. This trivia question explores how one famous brand leveraged folklore to create one of the most successful customer loyalty programs in history.

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Starbucks (with their 'Starbucks Rewards' program, formerly called 'My Starbucks Rewards')
Costa Coffee (with their 'Poseidon Points' program)
Peet's Coffee (with their 'Odyssey Rewards' program)
Dunkin' (with their 'Siren's Club' program)