- Self-checkout screens now ask customers for advice as consumers cry out for ’emotional blackmail’WTVD-TV
- Dave Portnoy blasts self-service tip kiosks over gratuity guilt: ‘I don’t do it to be a nice guy’fox business
- Consumers cry ’emotional blackmail’ as self-checkout screens ask for adviceABC7 News Bay Area
- Self-checkout kiosks make customers feel guilty even without human interactionYahoo finance
- ‘Emotional blackmail’ | Vending machines now ask customers to tipCBS News 8
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