Shapes and Pages – Extraordinarily Effective Web Strategies

Apart from being irrationally over-priced (like most proprietary software) the sizes of popcorn, soft drinks, etc. is inherently designed to force customers to consider the upsell. For example, a tiny bag of popcorn was $4.50, but a much larger bag was only $5.00. The idea being that only an idiot wouldn?t upgrade to get nearly twice the popcorn for a nominal upgrade fee. But really, this is customer railroading and essentially price fixing and creates a disconnect between customer choice and value-received.
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