Amazon UK hides the delivery price until the user selects an alternative option.

“Pretty amazed to see @AmazonUK use such dirty tricks. Standard delivery (default option) will actually cost you 4.49£ but you won’t notice until you click on another delivery option and then suddenly the prices (incl. FREE) appears. #darkpattern”

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Disclaimer: examples in the Hall of Shame are generally drawn from public submissions and cited sources; they have not been independently verified and may contain inaccuracies. They are presented as illustrations of design patterns, not findings of fact, unlawful conduct, or intent.