Which traditional cultural practice is widely considered the earliest precursor to modern customer loyalty programs?

Customer loyalty programs have deep cultural roots across different societies. Before modern point systems and membership cards, merchants around the world developed creative ways to encourage repeat business while honoring local traditions and values. This poll explores how cultural traditions influenced the evolution of customer loyalty concepts across different regions and time periods.

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Ancient Chinese 'Copper Cash' tokens given to returning customers during the Northern Song Dynasty (960–1127)
Middle Eastern bazaar 'trusted friend' discounts where merchants recognized family members across generations
European guild membership certificates that entitled craftsmen to preferential pricing from affiliated merchants
Indigenous American potlatch ceremonies where gifts were exchanged to establish social rank and trading relationships