What is the 'Sweetie' letter?

A personalized direct-mail outreach campaign Hint Inc developed during Nik Sharma's tenure as Director of DTC. Hand-addressed letters, hand-signed in founder Kara Goldin's voice (often opening with 'Sweetie'), sent to top-decile VIP customers. The campaign became a widely-studied example of audience-first DTC marketing.

Nik Sharma is a DTC growth advisor and founder of Sharma Brands consultancy. He served as Director of DTC at Hint Inc. He publishes a Substack newsletter and speaks publicly about DTC marketing tactics. His public writing has documented many of the campaigns he worked on directly.

How did the campaign produce ROI?

Two ways. Direct: the VIP segment receiving the letters had high LTV, and the personal touch reinforced retention and word-of-mouth. Indirect: recipients posted the letters on Twitter and Instagram, generating organic press and brand visibility far exceeding the production cost. The earned media often amplifies these campaigns more than the original recipients.

Can my DTC brand replicate this?

The principle transfers; execution is harder than it looks. Requires accurate VIP segmentation, authentic founder or executive voice, and willingness to invest meaningful time per letter. Templated 'thank you' letters mailed at scale produce nothing because they read as mass marketing. The work has to be genuinely personal.

What is the cost of personalized DTC outreach?

Variable by program design. Hint's letters reportedly involved actual letter-writing time, postage, and occasional gifts. For a few hundred VIPs over a year, total cost can run a few thousand dollars in materials plus meaningful labor time. The math works because VIP LTV is much higher than typical customer LTV.

Where can I read more about Nik Sharma and Hint?

Nik Sharma's Substack 'The Nik Sharma Show' publishes regular DTC playbook content. Kara Goldin's book 'Undaunted: Overcoming Doubts and Doubters' (2020) covers Hint's history. Various podcast interviews with Nik (on Shopify Masters, the My First Million podcast, etc.) document specific campaigns.

Nik Sharma's Sweetie Letter for Hint

Nik Sharma's "Sweetie" letter for Hint Water. The personalized DTC outreach that earned organic press and demonstrated audience-first growth marketing at scale.

By David Schaefer · LinkedIn · Updated May 2026

The premise

Nik Sharma is a DTC growth advisor who built the Sharma Brands consultancy, served as Director of DTC at Hint Inc, and has documented his work publicly through Substack, Twitter, and conference talks. Hint Inc, founded by Kara Goldin in 2005, makes unsweetened flavored water. Around 2018-2019, Nik and the Hint team developed a personalized direct outreach campaign that became widely studied as an example of audience-first DTC marketing. The campaign is commonly referred to as "the sweetie letter."

What the campaign reportedly did

Identified VIP customers. Hint segmented its customer database to identify the top-decile customers — high-LTV, frequent purchasers, advocates.
Sent personalized physical letters. Hand-addressed, hand-signed, often referencing specific orders or interactions. Used "Sweetie" or similar warm openings consistent with Kara Goldin's voice.
Made the customer feel seen. The letters were not promotional. They thanked specific customers for being part of Hint, sometimes included small gifts, and treated VIPs as actual people rather than CRM rows.
Earned organic social. Recipients posted the letters on Twitter and Instagram. The press picked up the story. The campaign produced earned media well beyond its production cost.

Why the campaign worked

The campaign demonstrated the audience-first principle at a granular level. Mass marketing treats every customer as a row in a spreadsheet. Hint's letters treated specific customers as specific people. The investment per customer was meaningful (an actual letter, real signature, often a small gift), but it was concentrated on a small VIP set where the LTV justified the cost. The earned media amplified the message far beyond the recipients.

What modern DTC operators take from this

VIP-segment programs produce outsized returns when the investment per VIP is justified by the LTV.
Physical mail still works when it's genuinely personal, not templated.
The line between customer-experience investment and marketing investment blurs at the VIP tier.
Earned media from personal touches often exceeds the cost of the touches themselves.
Founder-voice authenticity matters. The letters worked because Kara Goldin's voice was singular and the recipients felt they were getting a real note from a real founder.

What to read next

Glossier, Dropbox referral, Post-purchase experience, Audience segmentation.