Hey, it's Geb from Email Rev Lab!
At 9:28 PM, I signed up for Vital Proteins' 15% discount.
Three pop-ups. A personalised discount code on screen. Everything looked dialled in.
By 9:43 PM, 15 minutes later, no email. No SMS. Nothing.
That's the window where buyers bounce. And for a brand doing hundreds of millions in revenue, that's a quiet, expensive problem.
The Brand Bridge:
Kurt Seidensticker built Vital Proteins out of a personal problem. A NASA engineer with bad knees who couldn't find a collagen product that actually worked, so he built one himself for $25,000 in a Chicago factory.
Certified B Corp. America's number one collagen brand. Jennifer Aniston as Chief Creative Officer.
A brand built on precision and performance. But a 15-minute email delay says the welcome flow isn't running at that standard.
The Pop-up Test:
The first pop-up is clean. "Unlock 15% off Today" with a dropdown for interest category and an email field. Good specificity, good design. Conversion-focused.
The second pop-up collects phone numbers after email signup. Smart two-step. The copy "Prefer to text? Get your code texted to you" is low-friction.
The third pop-up shows the discount code directly on screen (SIGNUP15-KF9QZS79). That's a nice UX touch. But it creates a problem.
When the code is visible on-screen, the subscriber doesn't urgently need the email. That reduces open urgency before the welcome email even sends.
The Tech Test:
I signed up at 9:28 PM. At 9:43 PM, 15 minutes later, no email or SMS had arrived.
A 15-minute delay on a welcome email is a significant bottleneck. Real-time welcome emails convert at 4.01% compared to 0.94% for delayed sends (Invesp). That's more than 4x the conversion potential left on the table just from timing.
The trigger on this flow is misfiring. Either the list suppression is catching new signups, the flow trigger isn't set to "Subscribe to List" in real-time, or there's a profile merge delay on the backend.
The Inbox Test:
No email received during the audit window, so inbox tab placement and subject line performance cannot be confirmed.
What I can say: if it eventually arrives in Promotions or Spam, the 15-minute delay already had the subscriber's attention elsewhere.
The Email Creative Test:
Cannot evaluate because no email arrived during the 15-minute audit window. This is the bottleneck.
The Klaviyo Fix:
Go to Flows. Open the Welcome Series flow. Check the trigger. It should be set to "When someone subscribes to a list" with zero time delay on Email 1.
Check the Smart Sending toggle. If Smart Sending is on for Email 1, it can suppress sends to profiles that received an email recently. Turn it off for the first email only.
Check for a profile merge conflict. If the subscriber's email already exists in Klaviyo under a suppressed or unengaged segment, the flow may skip them. Add a filter: "Can receive email marketing equals true."
Test with a fresh, never-used email address to confirm the fix. The goal is delivery under 2 minutes from signup.
The Impact:
Real-time welcome emails convert at 4.01% vs. 0.94% for delayed sends (Invesp). A 15-minute delay means Vital Proteins is running at less than a quarter of their welcome flow's potential.
The Curiosity Hook:
Here's what I'm curious about: how many people saw that discount code on screen, left the site, and never came back because the email confirmation never hit their inbox?
The Pitch:
Vital Proteins has one of the strongest brand stories in the supplement space. Kurt's founding narrative, the B Corp certification, and Jennifer Aniston as CCO. The product earns trust. The welcome flow just needs to catch up.
I send these audits daily because bottlenecks like this can be fixed in one day with the right information.
Want me to audit your Klaviyo account the same way?
Reply to this email, and I'll send you a free breakdown of where your welcome series is leaking revenue.
Geb Vence
P.S. I run Email Rev Lab. We've generated $334k+ for brands by building systems that feel like conversations, not ads. I only work with 3 brands per month. Schedule your call here.