Which ancient civilization pioneered an early subscription model called 'annona civica' that provided citizens with regular grain distributions?

Before modern subscription services like Netflix and Amazon Prime, ancient civilizations developed their own versions of recurring payment systems for goods and services. These early subscription models helped ensure consistent access to essential resources while providing merchants with predictable income. Test your knowledge about these fascinating early commercial innovations that have evolved into today's subscription economy.

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Ancient Rome
Ancient Egypt
Mesopotamia
Ancient Greece