Хорошая заметка от Кохави - Drip-Pricing: A Highly Profitable Dark Pattern TL; DR: Drip-pricing (also called partitioned pricing or shrouded pricing) is a pattern where web sites highlight low prices that do not include mandatory surcharges and taxes. Consumers hate drip pricing, but A/B tests show that drip-pricing not only improves conversion, but also results in higher-priced booking per conversion. In a competitive marketplace, companies that do not want to lose market share and revenue might need to use this dark pattern until regulation is enacted. Это мы уже после Блиновской поняли, что людям нравится, когда их обманывают, внешне они конечно говорят нет, но голосуют рублем куда надо An article in the Wall Street Journal (Karp 2014) claimed that “Honesty may be the best policy, but it is taking a toll on sales for the nation's largest ticket reseller, StubHub.” While StubHub eliminated what it said was the “been the single biggest annoyance to most of its customers—hidden fees—its sales have taken a hit.