The Strongest Shopkeeper in History.

Summary

Zhou Yang, the owner of the Ten Thousand Worlds Tower, tasks Shen Wansan with creating a membership system to boost profits and control the flow of goods. Shen proposes a tiered system with exclusive benefits for members, particularly access to powerful items like weapons and elixirs. To become eligible for membership benefits, non-members must first accumulate a certain amount of value points through purchases. The system aims to maximize profits by incentivizing spending and controlling the acquisition of potentially disruptive items. Zhou Yang approves, adding that the system will have two tiers: ordinary membership for basic tracking and Black Iron membership for privileged access and discounts. He decides to issue three Black Iron cards: one fixed, one for the highest spender of the day, and one through a seemingly random lottery, maintaining an illusion of fairness.

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