The encyclopedia
Trust

The Crowd

The effect

"You feel safer choosing what others have already chosen."

The method

Humans use the behavior of others as a shortcut for 'is this safe / smart?' Numbers, logos, faces, and specifics all amplify this.

White hat
2/10
Most common usage on the angel→devil scale
The ethics spectrum

Same hack. Three very different choices.

White hat

Real customer counts, named testimonials with photos, verified review badges.

Grey hat

Vague counts ('thousands of happy users') without sourcing.

Black hat

Fabricated reviews, stock-photo testimonials, fake logos.

The template

A formula you can steal

[SPECIFIC NUMBER] + [RECOGNIZABLE PROOF] + [RECENT TIMESTAMP] near the decision.
Spotted in the wild

Where you've already seen this

  • Booking.com's '17 people are looking at this hotel right now'.
  • Linear's homepage rotating through Vercel, Ramp, OpenAI customer logos.
  • Substack showing your friends' subscriptions on a writer's page.
When to use it

Near any conversion decision: pricing CTA, sign-up form, checkout. Strongest when the proof is specific, recent, and recognizable to the visitor.

When NOT to use it

When you're brand new and the numbers would underwhelm. Better to lean on quality (one perfect testimonial) than vague volume.

The 5-minute practice

Try the trick today

Below your hero CTA, replace any vague proof ('loved by teams everywhere') with one specific, named, dated piece of proof. Ship it today.

Don't get hacked
Want to avoid this trick being run on you? Take the AI Marketing Course →

Free Marketing Hacked module included. See more cautionary tales and learn the playbook from the inside.

See it in action

7 teardowns use this trick

Visibly clearer skin in 28 days — or your money back.
Landing page
Grey
The 'Routine in 30 Days' DTC Landing Page

A skincare brand turns a moisturizer into a transformation story using social proof, specificity, and a perfectly placed scarcity cue.

5/10
DTC / BeautyReveal the trick →
The Cold Sales Email That Actually Gets Replies
Email
White
The Cold Sales Email That Actually Gets Replies

Six lines. Four tricks. One reply rate that beats the agency average by 4×.

2/10
B2B SalesReveal the trick →
The Black Friday Carousel Ad
Ad
Grey
The Black Friday Carousel Ad

How a single carousel ad layers urgency, anchoring, and pattern interrupt to stop the scroll on the busiest ad day of the year.

5/10
E-commerceReveal the trick →
The issue tracker you'll actually enjoy using.
Landing page
White
The Linear Landing Page That Makes You Want to Switch Tools

Status signaling, named villains, and pristine fluency turn a project tracker into an identity decision.

2/10
B2B SaaSReveal the trick →
The Old Spice Reinvention — How to Steal Back a Category
Ad
White
The Old Spice Reinvention — How to Steal Back a Category

How a 75-year-old brand became cool again by naming a villain ('the man your man could smell like'), breaking every ad pattern in the category, and making women the buyer.

2/10
CPGReveal the trick →
Volkswagen 'Clean Diesel' — Marketing a Lie at Industrial Scale
Ad
Black
Volkswagen 'Clean Diesel' — Marketing a Lie at Industrial Scale

VW spent a decade telling the world its diesels were green while shipping software that cheated emissions tests. The marketing was the cover for the fraud — and it cost $33B+ in fines.

10/10
AutomotiveReveal the trick →
Sunday Riley — When the Founder Tells Staff to Fake the Reviews
Social
Black
Sunday Riley — When the Founder Tells Staff to Fake the Reviews

A leaked internal email from founder Sunday Riley instructed employees to write fake five-star Sephora reviews — including how to use VPNs and dislike negative reviews. The FTC settled, the receipts went viral.

10/10
DTC / BeautyReveal the trick →