Teardowns › Email › Zero-price effect

Jane Iredale gives a $38 'value' gift with a $100 order

Jane Iredale · Email · Subscribers · Email Love: 11 Sep 2026 · from janeiredaleonline@janeiredale.com

ConditionalZero-price effect Reference price

Inbox

Jane Iredale11 Sep 2026

Don't miss your FREE Eye Shadow Triple

Subject lines as listed on Email Love. We don't re-host their images.

Step by step

1
"Free full-size PurePressed Eye Shadow Triple with all orders $100+", with code MYEYETRIO.
2
A badge on the product image says "$38 value".
3
"Pick from 12 triples" lets the customer choose which one.

Prices quoted in dollars ($), exactly as shown on the email we captured. Prices vary by region and change over time.

The psychology

Why it nudges

Jane Iredale uses the zero-price effect: a free full-size product is valued more than an equivalent discount. The "$38 value" badge gives a reference price for the gift. Results are not public.

● Mixed evidence (as used here) · More on zero-price effect, with sources →

Context

A cosmetics brand's gift-with-purchase promotion, a long-standing beauty retail tactic.

Honest nudge or dark pattern?

Conditional

Honest nudge if the $38 is the real retail price. 'Don't miss' copy shouldn't imply a deadline that doesn't exist.

Steal this, honestly

Offer a free full-size product instead of a percentage off, if your margins allow.
Show the gift's retail value next to it.
Let customers pick their gift from a few options.

What to test: Free gift ($38 value) vs $20 off $100. Measure conversion and margin per order.

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: Jane Iredale: Jane Iredale gives a $38 'value' gift with a $100 order
Bias: Zero-price effect: 'Free' is treated as more than just a lower price.
Why it nudges: Jane Iredale uses the zero-price effect: a free full-size product is valued more than an equivalent discount. The "$38 value" badge gives a reference price for the gift. Results are not public.
Our verdict: Conditional. Honest nudge if the $38 is the real retail price. 'Don't miss' copy shouldn't imply a deadline that doesn't exist.
Source page: https://nudgeswipe.com/examples/jane-iredale-free-full-size-gift/ (JSON: https://nudgeswipe.com/api/teardowns/jane-iredale-free-full-size-gift.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.

Open in ChatGPT Open in Claude Open in Grok Open in Cursor

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 (11 Sep 2026)
Shampanier, Mazar & Ariely (2007), Zero as a special price. doi.org/10.1287/mksc.1060.0254

Related teardowns

slack.com

Slack Pricing screenshot, captured 16 Oct 2026

Reference priceConditional

Slack shows the full price struck through next to the intro price

Slack · Pricing · $ as captured

mailchimp.com

Default effect / status quo biasHonest nudge

Mailchimp preselects a free trial of its Standard plan

Mailchimp · Pricing · $ as captured

spotify.com

Spotify Pricing screenshot, captured 16 Oct 2026

Zero-price effectConditional

Spotify leads with "£0" and spells out the price after

Spotify · Pricing · £ as captured

5 new nudges, every Friday

Five real product and marketing moments, the psychology behind each, and one thing to try. Weekly issues start soon. Your email is stored with our email provider (Resend) and used only for this newsletter.