Dorai puts the deadline in three words and the exact cut-off in the small print

The psychology

Why it nudges

Dorai uses urgency: the full stops slow the subject line down so the deadline lands, and the bracketed question nudges people who meant to shop but didn't. The exact end time makes the deadline concrete. Results are not public.

● Strong evidence · More on urgency (deadline effect), with sources →

Context

A US home goods brand's last-day sale email to its list.

Honest nudge or dark pattern?

Conditional

Honest only if the sale isn't extended or brought back. If it is, it's fake urgency. See deceptive.design/fake-urgency.

Steal this, honestly

Put the deadline at the start of the subject line on the last day.
State the exact end time somewhere in the email.
Add a short, personal-sounding question for people who opened earlier emails but didn't buy.

What to test: Last-day email with vs without the bracketed question. Measure revenue per recipient.

Next: run it on your product

Apply this with your agent

Take the steps above into your own flow. The prompt carries this teardown, the honest-vs-dark line and the steps.

You are helping me apply a behavioural-design pattern ethically.

Pattern: Dorai Home: Dorai puts the deadline in three words and the exact cut-off in the small print
Bias: Urgency (deadline effect): A limited time to act prompts action now.
Why it nudges: Dorai uses urgency: the full stops slow the subject line down so the deadline lands, and the bracketed question nudges people who meant to shop but didn't. The exact end time makes the deadline concrete. Results are not public.
Our verdict: Conditional. Honest only if the sale isn't extended or brought back. If it is, it's fake urgency.
Source page: https://nudgeswipe.com/examples/dorai-sale-ends-tonight-did-you-shop/ (JSON: https://nudgeswipe.com/api/teardowns/dorai-sale-ends-tonight-did-you-shop.json)

Rules: say a brand "uses" a tactic, never that it "worked"; outcomes are not public unless the company published them; no invented uplift estimates; flag mixed evidence. Honest nudge = true, visible, easy to reverse, and in the user's interest. Dark pattern = hides costs, fakes scarcity or popularity, shames, or makes leaving harder than joining. Quote company-published results as "X reports", with the source link, and don’t generalise them. Don’t cite retracted or failed-to-replicate studies as support (e.g. Ariely & Wertenbroch 2002). Don’t state study figures unless they’re on this page or in a source you can link. If an idea crosses the line, link the matching deceptive.design pattern.

Tasks:
1. Ask me for my product, the flow (URL or screenshots) and the goal.
2. Audit where this pattern already appears, or could, in that flow.
3. Propose 2-3 ethical experiments: hypothesis, variant copy or UI, primary metric, and a guardrail metric (refunds, complaints, cancellations).
4. Flag every dark-pattern risk and say how to stay on the honest side.

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ChatGPT, Claude, Grok and Cursor open with the prompt filled in (it is also copied, in case the prefill doesn't load). Gemini and Codex don't support prefilled links, so the prompt is copied and the app opens; paste it in.

Sources

Email on Email Love (14 Oct 2026)
Inman & McAlister (1994), Do coupon expiration dates affect consumer behavior? Also Shu & Gneezy (2010). doi.org/10.2307/3152229
deceptive.design: fake-urgency

Dorai puts the deadline in three words and the exact cut-off in the small print

Why it nudges

Conditional

Apply this with your agent

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