Which loyalty technique did ancient Egyptian merchants use around 1300 BCE to encourage repeat customers?

Before modern loyalty programs and digital analytics, ancient civilizations developed sophisticated retail systems and brand recognition strategies. From Phoenician merchant marks to Roman quality seals, the foundations of brand loyalty stretch back millennia. This trivia question explores how ancient Egyptians implemented one of history's earliest known customer loyalty systems—a fascinating precursor to modern retail loyalty programs.

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Clay token systems where customers collected tokens with purchases to exchange for discounts on future transactions
Papyrus scrolls that tracked customer purchases, with every tenth purchase being free
Branded amulets that customers wore to identify themselves as preferred patrons of specific merchants
Royal certificates issued by the Pharaoh granting nobility special pricing at palace-approved merchants