Which retail innovation did ancient Egyptian merchants pioneer around 3000 BCE that fundamentally changed how products were presented to consumers?

Before modern shopping malls and e-commerce, ancient civilizations developed sophisticated retail systems that laid the groundwork for today's commerce. From the agoras of Greece to the bazaars of Mesopotamia, product development and consumer psychology were already being leveraged thousands of years ago. This trivia question explores one of the most significant retail innovations from ancient Egypt that revolutionized how products were marketed and sold.

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Branded packaging with merchant seals to guarantee authenticity
Seasonal discount festivals aligned with Nile flooding cycles
Product catalogs inscribed on papyrus for remote ordering
Loyalty tokens that could be exchanged for premium goods