$700K Extra Fixing These Emails (Klaviyo Elite Agency)

George Kapernaros is the founder of YOCTO, one of about 40 Klaviyo Elite agencies in the world, running retention for subscription brands. We asked him where subscription brands lose money after the first order, and what he does about it.

His answer starts with an uncomfortable idea: retention won't save a business whose acquisition doesn't work. Then he gets specific.

What's covered in this episode

  • The billing reminder: why George calls it the most common mistake, in 99% of cases, and how YOCTO turns it into a "gifting moment" instead
  • The LTV Parthenon: the three pillars of subscription lifetime value and the metrics under each
  • Klaviyo attribution: why the default settings can make results look inflated, and the 2-hour open, 1-day click window YOCTO uses
  • The upgrade email: how messaging active subscribers, which the industry says to avoid, drove an extra $700K for a collagen brand
  • Psychographic segmentation: the controlled test that lifted revenue 47% for Gratsi
  • How YOCTO uses AI across the agency, from real-time profitability tracking to aligning email with ads

Chapters

  • 0:00 Intro: George Kapernaros of YOCTO
  • 1:09 Why retention won't save a broken business
  • 4:32 Subscription programs vs email programs
  • 7:19 The #1 subscription mistake: the billing reminder
  • 9:44 Why top brands send the reminder at 3AM
  • 10:52 Turning the billing reminder into a gifting moment
  • 11:45 Why agencies need the brand's financials
  • 13:31 The LTV Parthenon: 3 pillars of lifetime value
  • 17:46 Is Klaviyo attribution inflated?
  • 20:34 The attribution settings YOCTO uses
  • 21:13 The $700K upgrade email
  • 24:03 Psychographic personalization: the Gratsi test
  • 27:47 When personalization is worth it (and when it isn't)
  • 29:53 Landing pages after the email click
  • 32:31 Why lean teams win: $300M with 40 people
  • 34:04 How YOCTO uses AI across the agency
  • 37:46 Using AI to align email with ads
  • 40:30 Sharing AI context across a team
  • 43:15 The agency role after Klaviyo Composer
  • 46:28 Wrap-up and George's teardown pick

Links

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About the author
Ethan Denney
Co-Founder & CEO, ConvertFlow
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Ethan is the Co-Founder & CEO of ConvertFlow.