How a Cold Email, a 45-Minute Demo, and Mobile DOOH Changed Everything for Lumix Ads

Proving Mobile DOOH Works Beyond Local Businesses

The Cold Email That Opened Doors

Every startup faces a defining moment where they must prove their concept works at scale. For Lumix Ads, that moment came in April 2025.

We had the infrastructure: 25 scooters with LED digital screens, live fleet tracking, and the ability to deploy hyperlocal advertising campaigns across Miami. But we faced a critical credibility gap.

Local businesses believed in our mobile DOOH platform. Enterprise brands? They needed proof.

The question wasn't whether our technology worked—it was whether we could execute at the speed and scale that major brands demand from their advertising partners.

The Opportunity

When POSSIBLE—a major marketing and technology conference—announced their Miami event, tickets were $2,000+ per person. For a bootstrapped mobile advertising startup, that investment was out of reach.

Our CEO, Jonathan Sherman, saw a different angle.

The Pitch

Instead of buying tickets, Jonathan crafted a cold email proposing a trade:

"We're Lumix, a Miami-based mobile DOOH platform. We can run your conference branding on our scooter fleet around the venue. In exchange, we'd like VIP passes to attend."

The Result

POSSIBLE said yes.

The arrangement was simple: we'd promote their conference on our mobile digital screens throughout the event area, and in return, we'd get VIP access—direct exposure to every major brand and agency attending.

Return on investment: Our operational time and resources we were already deploying.
Value gained: Access to enterprise decision-makers actively seeking innovative advertising channels.

Most companies attend conferences hoping to make connections. Jonathan Sherman prepared differently.

Pre-Conference Research

Before POSSIBLE's Day 1, Jonathan had already:

✅ Identified which performance marketing agencies were attending
✅ Researched Clear Trust—an OOH agency working with major fortune 500 conmpanies
✅ Set up a lunch meeting before the conference even started

The Attendees:

• Jonathan Sherman (Lumix Ads CEO & Co-Founder)
• Iñaki Usandizaga (Lumix Ads COO & Co-Founder)
• Clear Trust Performance Marketing Team

The Conversation

Jonathan walked Clear Trust through Lumix Ads' mobile DOOH capabilities:

• Real-time creative deployment on delivery scooters
• Hyperlocal targeting down to the block level
• Live fleet tracking and campaign management
• Device ID capture for retargeting audiences
• Full execution flexibility and speed

Clear Trust was interested—but they'd heard pitches before from traditional out-of-home advertising vendors promising "flexibility" and "innovation."

Then Jonathan asked the question that closed the deal:

"Do you think you could have one of your drivers here—right here at this restaurant—by the time lunch is over, with your logo on the screen?"

Clear Trust's response: "Wait, seriously? You can do that?"

Jonathan's answer: "Absolutely. Send us your logo."

The Challenge

Clear Trust sent their logo. The clock started ticking.

Our task:

• ✅ Design the creative
• ✅ Upload it to a screen
• ✅ Coordinate with a driver
• ✅ Get the branded scooter to the restaurant
• ✅ Complete everything within 30 minutes

The Execution

Iñaki immediately called our CTO. Within 10 minutes, the creative was designed and ready to deploy.

Next: driver coordination. One of our Lumix-equipped delivery drivers was nearby. We uploaded the creative remotely to his LED screen.

30 minutes after the challenge was issued:

A Lumix scooter pulled up outside the restaurant.

The screen lit up: Clear Trust's logo rotating in high-definition on the LED display.

Clear Trust's reaction: "Holy shit. You actually did it."

Jonathan's response: "This is what we do. Anywhere in Miami. Any creative. Any time. And we can do it at scale."

That real-time demo closed the deal.

Not a PowerPoint deck.
Not a case study presentation.
Not a follow-up call.

A driver showing up in 30 minutes with their logo live on a mobile digital billboard.

From One Agency to Enterprise Brands—DoorDash, Instacart & Publix

Clear Trust saw what most OOH advertising vendors only promise: actual real-time flexibility and execution speed.

Within 48 hours, Clear Trust introduced Lumix Ads to two of their major clients:

• DoorDash
• Instacart
• Publix

What Enterprise Brands Actually Want from Mobile DOOH

These weren't theoretical conversations about impressions and CPMs. DoorDash and Instacart had specific needs:

❌ Not interested in: Retargeting dashboards, attribution platforms, or traditional OOH metrics
✅ Actively seeking: Market dominance during key events, speed of execution, and proof that a startup could deliver at enterprise scale

They wanted a mobile advertising platform that could move as fast as their businesses did.

Working with enterprise clients taught us a critical lesson: big brands don't want background noise.

They want to own moments.

The "Swarm" Concept

We executed a coordinated deployment strategy:

• 10-20 scooters converge simultaneously on a single high-value location
• Create unmissable brand saturation rather than scattered impressions
• Deliver total market dominance in one place at one time

Not random placements. Not passive exposure.

Concentrated, coordinated, impossible-to-miss brand presence.

DoorDash: Three Major Event Swarms Across Miami

After seeing our execution capabilities in real-time, Clear Trust contracted Lumix Ads for three major DoorDash event activations across Miami.

What DoorDash Wanted:

• Street-level market dominance during each event
• Ability to deploy quickly and adjust creative in real-time
• Proof that mobile DOOH could deliver measurable impact at scale

What We Delivered:

✅ Three separate coordinated swarm activations
✅ 5-10 scooters per event with live tracking
✅ Real-time creative adjustments based on event flow
✅ Full campaign flexibility that traditional OOH can't match

Why It Worked:

DoorDash had run traditional out-of-home advertising before—static billboards, transit ads, highway placements.

But they'd never experienced:

• The ability to concentrate their entire OOH presence at a single high-value moment
• Real-time creative and route adjustments during live campaigns
• Movement and dynamism that matched their brand identity

Their feedback: "This mobile DOOH campaign actually felt like an event, not just advertising."

Instacart: Same Mobile DOOH Playbook, Same Market Impact

The Campaign

Instacart wanted to own Miami during their key promotional periods through hyperlocal mobile advertising.

The Execution

Multiple coordinated swarm activations:

• ✅ High-traffic area targeting based on customer density data
• ✅ Timing synchronized with their marketing calendar
• ✅ "Everywhere at once" saturation that traditional OOH cannot achieve

The Result:

Instacart experienced what enterprise brands are increasingly seeking from mobile DOOH: advertising that moves with their customers, adapts in real-time, and delivers measurable market presence.

What Enterprise Clients Taught Us About Mobile DOOH

When Lumix Ads started, we assumed enterprise brands would prioritize:

• Device ID retargeting capabilities
• Attribution dashboards
• Cost per impression metrics

What they actually care about:

1. Execution Speed

"Can you move as fast as our business does?"

Traditional OOH advertising requires weeks of planning and approval. Mobile DOOH with Lumix Ads deploys in hours.

2. Market Dominance

"Can you make us impossible to miss?"

Static billboards compete for attention. Coordinated mobile DOOH swarms own entire areas.

3. Flexibility

"Can you adjust campaigns in real-time?"

Highway billboards are fixed. Our mobile digital screens adapt to events, traffic patterns, and campaign performance on the fly.

4. Startup Credibility

"Can a young company deliver at enterprise scale?"

The 45-minute Clear Trust demo answered this question permanently. We've executed consistently for DoorDash and Instacart since.

The swarm strategy delivers all four—which is why mobile DOOH is rapidly becoming a standard enterprise advertising channel.

The Real Lesson: Scrappy Execution Beats Perfect Planning

Conventional startup wisdom says:

1. Secure major funding first
2. Build massive infrastructure
3. Create the perfect pitch deck
4. Then pursue enterprise clients

What actually worked for Lumix Ads:

✅ Jonathan cold emailing to get into POSSIBLE
✅ Setting up a lunch meeting with Clear Trust before the conference
✅ Pulling off a real-time demo in 45 minutes
✅ Delivering coordinated swarms that dominated Miami markets
✅ Being scrappy enough to say "yes" and figure it out

The truth about enterprise sales:

Big brands don't need you to be the biggest company. They need you to execute without excuses.

What's Next for Lumix Ads: Scaling Mobile DOOH Nationwide

Current Expansion (October 2025):

• Growing from 25 → 125 mobile DOOH screens across Miami
• Enhanced fleet tracking and attribution capabilities
• Expanded driver network for sampling and direct mail integration

Q1 2026: San Francisco Launch

• 100 mobile digital screens
• Bay Area enterprise partnerships
• Tech startup and CPG brand targeting

Q2 2026: Los Angeles Launch

• 100 mobile digital screens
• Entertainment and consumer brand focus
• Multi-market coordinated campaigns

The Vision:

Make mobile DOOH a standard advertising channel for enterprise brands across every major U.S. city.

Not as a "test budget" or "experimental channel."

As the go-to platform for brands that want to dominate local markets with speed, flexibility, and measurable impact.

Why Mobile DOOH Is the Future of Hyperlocal Advertising

Traditional out-of-home advertising is stuck on highways and static locations.

Lumix Ads operates differently:

Real-Time Deployment

Upload creative and deploy campaigns in hours, not weeks.

Hyperlocal Targeting

Target specific neighborhoods, events, and customer density areas down to the block level.

Device ID Capture & Retargeting

Unlike traditional billboards, we capture device IDs and create retargeting audiences for your digital campaigns.

Swarm Activations

Coordinate 10-20 mobile screens to converge on high-value locations for total market saturation.

Attribution & Measurement

Track campaign performance, web visits, store foot traffic, and actual conversions—capabilities traditional OOH cannot offer.

Sampling Integration

For CPG brands: combine mobile DOOH advertising with product sampling through our driver network for full-funnel customer acquisition.

Want to See What Lumix Ads Can Do for Your Brand?

We're onboarding enterprise clients for our expansion across Miami, San Francisco, and Los Angeles.

Whether you're launching a CPG product, driving foot traffic to retail locations, or dominating a market during a major event—Lumix Ads delivers mobile DOOH campaigns that create unmissable brand moments.

Book a strategy call to discuss:

• Coordinated mobile DOOH swarm activations
• Hyperlocal targeting and campaign planning
• Device ID retargeting and attribution
• Product sampling integration for CPG brands
• Multi-market campaign coordination

Book a Strategy Call →

See Our Work →

About the Author:

Iñaki Usandizaga is Co-Founder & COO of Lumix Ads, a mobile digital out-of-home advertising platform operating across Miami, with expansion to San Francisco and Los Angeles in 2026. Lumix Ads partners with enterprise brands like DoorDash and Instacart to deliver hyperlocal mobile advertising campaigns with real-time execution and measurable attribution.

Follow the journey on LinkedIn.

‍