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I Find the Revenue Your Last Agency Left on the Table

Book a free 30-minute call and I'll look at your Meta, Klaviyo, and Shopify data live and show you where money is leaking. No deck, no pitch, just the leaks. If you want the full teardown after that, the Growth Diagnostic goes deeper.

Book a Free 30-Min Leak Review

20 minutes. You leave with your top 3 revenue leaks, whether we work together or not.

Guin Marie Hernaez - Marketing Engineer and Founder of GScale Marketing
TRUSTED BY 20+ BRANDS • US • UK • CA • AU •

Trusted by Leading Brands

Guin Hernaez, Marketing Engineer and Founder

Meet The Founder

The Engineer Behind Your Growth

I spent years as a Metallurgical Engineer and Data Analyst before making the leap into Digital Marketing. That engineering brain became the foundation for everything I build today.

I diagnose ad problems the way I used to diagnose production line failures: systematically, with data, and without guessing. As of today, I have scaled 20+ brands across 4 countries.

I am a mom, a wife, and a woman of faith building a business from the Philippines with integrity at the center of every decision.

"I don't run campaigns. I engineer systems that actually work."

Engineer's Edge

Marketing diagnosis rooted in an engineer's systematic approach. No gut feelings.

Data-Driven

Every decision backed by real data. Track, measure, optimize.

Global Reach

Brands across the US, UK, Canada, Australia. Full overlap with US, UK, and AU business hours.

Case Studies

Results I've Engineered

Featured case study: $6.3M revenue growth chart from DTC hairstyler brand launch
Featured Case Study

$0 to $6.3M in Year One

DTC Hairstyler Brand, UK

$6.29M

Total Sales

+314%

Conversion Rate

300K+

Sessions

New brand, near-zero baseline. Full Meta Ads funnel built on UGC creative from day one, 75+ creatives tested, 5 to 8 new ones weekly. Monthly revenue crossed $1M by April 2025 and peaked at $1.75M in May.

DTC brand growth from $0 to $6.3M in 10 months showing sessions, conversion rate, and total sales charts

Meta Ads

$6.3M Year-One Launch

$6.29M

Sales

+314%

CVR

From near zero to $1M+ months in under a year. UGC-led Meta funnel, 75+ creatives tested. Verified in Shopify, not an ads dashboard.

Clothing brand Meta Ads campaigns showing 6.07 to 6.77x ROAS with $8.67 cost per purchase

Meta Ads

6.77x ROAS: Consistent Scale Without Discounts

6.77x

ROAS

$8.67

Cost Per Purchase

6.77x blended ROAS sustained across multiple product drops at $16.5K total tracked spend, without creative burnout.

Skincare brand Meta Ads campaigns showing 17x to 90x ROAS with $1.27 cost per purchase

Meta Ads

17x ROAS: Funnel Rebuild for Skincare Brand

17x

Evergreen ROAS

$1.27

Best CPA

17x ROAS on evergreen retargeting specifically. Email is high-leverage; this is not a cold traffic number. Peaked at 90x during BFCM on $200 spend.

Shopify conversion rate chart showing 226% improvement from under 1% to sustained 7% plus

Shopify CRO

+226% Conversion: CRO Turnaround

+226%

Conversion Rate

7%+

Sustained Rate

Sessions climbing while conversion collapsed. Full-funnel CRO rebuild starting December 2024. Rate recovered and held above 7% for six straight months.

Klaviyo returning customer rate chart showing steady climb from 52% to 70%

Email Marketing

52% to 70%: Returning Customer Engine

70%

Returning Rate

$18.1K

Best Single Send

Segmented campaign calendar and lifecycle flows. Top sends generated $15.6K, $18.1K, and $12.7K individually. Returning rate held steady at 70%.

The Transformation

From Leaking Revenue to Scalable Growth

Where You Are Now

The Problem

Ad spend going out with no clear return

No email flows, leaving 30-40% of revenue on the table

Shopify store converting below 1.5%

No system, no strategy, just scattered tactics

Past agencies delivered reports, not results

Where You'll Be

The Outcome

Profitable ad campaigns with clear ROAS tracking

Automated email flows generating revenue 24/7

Optimized store converting at 2.5%+ with higher AOV

A complete growth system with weekly reporting

A strategist who treats your brand like their own

Trusted By Growing Brands

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How I Actually Work

The Systems Behind the Numbers

1

Meta Ads Manager

Ad signals and spend data

2

Shopify + GA4

Purchase data and attribution

3

Klaviyo

Segmentation and flow triggers

4

Claude AI

Creative briefs and analysis

5

Dashboard

Automated reports and scoring

Before

The Manual Process

Weekly reporting meant 4 hours of manual pulls across Meta Business Suite, GA4, and Klaviyo. Copy-pasting screenshots into slides. Data was always stale by the time anyone saw it.

After

The System

Automated pipeline pulls live data from all three platforms, scores performance against benchmarks, and delivers a prioritized report every Monday at 8am. Anomalies get flagged the same day they happen.

16 hours/month reclaimedIssues caught in days, not weeksZero manual data pulls
SystemFlow Dashboard showing automated reporting pipeline with Meta Ads, Shopify, Klaviyo, and AI integration SystemFlow mobile dashboard showing platform performance, alerts, and automated reporting
Workflow Screenshot

"I don't use AI to write captions. I build systems that find revenue leaks while you sleep."

Video Testimonials

Hear It from My Clients

Chrissy P.

Founder

Sarah P.

Social Media Influencer

★★★★★

"Our revenue jumped and our brand finally has a real growth system behind it."

We're so happy and grateful to you, Guin and team. For complete professionalism, proactive work, and incredible results from the very first month.

Georgia B.

E-Commerce Brand Owner

Is This Right for You?

This is for you if...

You're doing $50K+/month in revenue and ready to scale systematically

You've tried agencies before and been burned by vague reporting

You want a strategic partner, not just a task executor

You're willing to invest in growth systems that compound over time

This is NOT for you if...

You're looking for the cheapest option and want to compete on price

You want overnight results without giving strategy time to work

You're not open to data-driven recommendations that challenge your assumptions

Service Packages

Start with the Diagnostic. Stay for the system.

Growth Diagnostic

$500one-time

A full teardown of your Meta, Klaviyo, and Shopify setup. You get a written, prioritized fix list ranked by revenue impact, whether you work with me after or not. Fully credited toward your first month if you continue.

Get Your Diagnostic
Most Popular

Growth Partner

$2,000/mo

Done-for-you execution of your fix list. Meta Ads, Klaviyo flows and campaigns, and ongoing CRO, managed as one system. Weekly reporting in plain numbers, not vanity metrics. 30-day notice, no lock-in.

Start Growing

Full-Stack Growth

Custom

For brands past $50K/mo that need a full growth department: paid social, email and SMS, CRO, and creative testing under one accountable lead. Scoped after your Diagnostic.

Let's Talk

Diagnostic guarantee: if I don't find at least 3 revenue leaks in your account, the $500 comes back to you. You risk nothing but 30 minutes.

Questions You're Probably Asking

What if I've already been burned by an agency before?

I get it. Most of my clients come from exactly that experience. The difference here: I start with a diagnostic, not a pitch. You see the gaps in your system before you commit to anything. Every recommendation is backed by your data, not a playbook I copy-paste across clients.

How quickly will I see results?

Most clients see measurable improvement within 30 to 60 days. Ad campaigns typically need 2 to 4 weeks to optimize. Email flows start generating revenue immediately after launch. I set expectations clearly during onboarding so there are no surprises.

What kind of time commitment do you need from me?

Minimal. I handle strategy, execution, and reporting. You show up for a weekly or bi-weekly call, approve creative when needed, and review results. Everything else is done for you.

Can you work alongside my existing team or other vendors?

Absolutely. I plug into your existing setup. Whether you have an in-house team, a separate dev agency, or other vendors, I collaborate and communicate clearly. I use Slack, Loom, and shared dashboards so everyone stays aligned.

What happens if it's not working? Can I cancel anytime?

Yes. My packages are monthly with no long-term contracts. If you want to pause or stop, you can. All strategy work, assets, and data are yours to keep. I earn your business every month, not through a lock-in.

Free Resource

The Revenue Leak Checklist

The 15-point diagnostic I run on every new client's growth system. Now yours for free.

  • The 5 Meta Ads mistakes that silently drain your budget (and the exact settings to fix them)
  • The 4 Klaviyo flows that generate 30-40% of revenue for top eCommerce brands (most stores have zero)
  • The 6 Shopify conversion killers hiding on your product pages (with before/after examples)
Check your inbox. The Revenue Leak Map is on its way.

No spam. Unsubscribe anytime.

Resource Mockup Image

20+

Brands Served

4

Countries

6.5x

Avg. ROAS

98%

Client Retention

Let's Work Together

Ready to Fix Your Growth System?

Your engineer-led growth partner. Tell me what you're working with and I'll show you where the gaps are. No sales pitch. Just a real conversation about your brand.

Book a Free 30-Min Leak Review

30 minutes. You leave with your top 3 revenue leaks, whether we work together or not.

Guin Hernaez

Engineer-led digital growth for eCommerce brands

guin@thegoodscale.com

© 2026 GScale Marketing. All rights reserved.

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The Revenue Leak Map by Guin Hernaez

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