Which of the following was a genuine product marketing strategy used in ancient civilizations?

Before digital ads and social media campaigns, ancient civilizations developed sophisticated marketing strategies to sell their goods. From Phoenician merchants advertising their purple dyes to Roman shopkeepers displaying wares in carefully designed storefronts, marketing has ancient roots. This poll tests your knowledge about how our ancestors promoted their products and built their commercial empires. Can you identify the authentic ancient marketing technique from the imposters?

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Mesopotamian clay tablets featuring product testimonials from satisfied customers, often discovered near marketplaces (c. 2000 BCE)
Egyptian merchants using colored smoke signals above their shops to indicate daily special offers and new inventory arrivals
Greek merchants implementing a 'punch-tablet' loyalty system where repeat customers collected marks to earn free amphora of olive oil
Roman businesses distributing miniature models of their products to potential wealthy customers in a primitive form of free samples