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01The Discount That Knew You Were Hesitating: Rule-Based Personalisation in an Online Pharmacy
How Zovita+ turns browsing into personal discounts without a machine-learning model: one visitor key for guests and customers, interaction counters, six offer rules, one pricing function for the bag and the charge, offers locked and redeemed once at checkout, guest-to-account merging, A/B tests, and the edge cases that shaped it.
10 minThe Engineering Logs