McDonald's gives away unlimited free refills and still makes a profit. Verizon charges $2 for your first minute and $0.10 for your tenth. Nike sells you a second pair at half price. These aren't coincidences — every one of these decisions is engineered around the same hidden economic rule.

📘 WHAT YOU'LL LEARN

• What marginal utility is and why satisfaction from any product reliably decreases with every additional unit — until it reaches zero or turns negative

• How the Law of Diminishing Marginal Utility solves Adam Smith's famous diamond-water paradox and explains why scarcity determines price

• How Nike, Verizon, AMC, DoorDash, and McDonald's all engineer their pricing to extract maximum value at every stage of the utility curve

• Why free offers are never charity — they are a calculated bet that your utility has already hit zero, making the giveaway cost almost nothing

📦 WHAT'S INCLUDED

• 15-page visual PDF covering the full marginal utility framework

• The diamond-water paradox breakdown

• Four-product blueprint showing how brands map your psychological drop-off

• Nike BOGO, Verizon tiered pricing, AMC free upgrade, and McDonald's refill case studies

• The Ultimate Rule of Pricing — complete marginal utility curve

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