No First-Party Data? No Problem. Why Brands Need Better Personas, Not Bigger Lists

There’s a familiar refrain in marketing commentary these days:
“Cookies are going away. You need to lean into your first-party data.”

That might work for a streaming platform, a supermarket, or a subscription box service – but what if your business doesn’t naturally collect customer data at scale?

Not every brand has the luxury of a logged-in user base or repeat transactions. And some sectors – like high-consideration home improvements or big-ticket medical aids – don’t lend themselves to recurring customer journeys.

So where does that leave you?

When Repeat Purchase Isn’t Part of the Plan

Take Mobility Bathing Group. They run a family of brands offering walk-in baths and easy-access showers for people with mobility challenges.

Their audience tends to be older – the average customer is 79 – and they’re usually making a once-in-a-lifetime purchase. There’s no ongoing app engagement, no loyalty scheme, no email nurture journey.

And yet, the marketing has to work. Because this is a major decision – and often an urgent one. It’s emotional, it’s practical, and it involves multiple stakeholders:

• Older individuals taking charge of their independence
• Partners worried about falls and safety
• Adult children researching solutions on behalf of a parent

That’s not a simple persona. And “65+” as a targeting bracket doesn’t come close.

Why Traditional Demographics Let You Down

Here’s the problem with relying on platform data: it’s too crude.

In the programmatic world, 65-year-olds are lumped in with 85-year-olds. But the difference between someone recently retired marathon runner and someone with advanced mobility issues is significant – in needs, mindset, and media habits.

And if you can’t rely on behavioural tags, third-party cookies, or a deep CRM file, what’s left?

Use What You Can Hear

One of the most underused assets in marketing today? Customer reviews.

They’re honest, detailed, and direct – the literal voice of the customer.

At Harvest, we incorporate these into our Receptivity Model, which we use to help brands like Mobility Bathing Group market more effectively – even in low-data environments.

We start by building detailed personas, drawing from:

• Customer reviews and call centre feedback
• Search intent and online behaviour
• Publisher audience panels
• AI-powered analysis of creative response

Turning Personas Into Plans

These personas go far beyond simple demographics. They include:

• Key needs and decision drivers
• Typical objections and questions
• Media habits and preferences
• Seasonal or situational triggers for action

From here, we follow a three-step approach:

1. Persona-led marketing planning
We define not just who the audience is, but when they’re most likely to engage, what matters to them, and what might get in the way.

2. Journey mapping
We lay out customer journeys that highlight key media touchpoints – across channels like search, display, DooH, audio, and connected TV – ensuring relevance at each stage.

3. Media investment planning
We calculate what kind of spend is required to deliver those journeys effectively, balancing reach, frequency and creative impact.

The result is planning that’s customer-first, seasonally aware, and built with message delivery in mind – not just media mechanics.

Matching The Message to the Moment

Here’s what that looked like in practice:

We worked with Mobility Bathing Group to tailor campaign creative by persona, running parallel tracks of messaging based on likely mindset and life stage.

For example, ads targeting adult children focused on peace of mind, family safety, and trusted installation.
Meanwhile, messaging for older customers leaned more on regaining independence and making life easier – without moving home.

We also layered in contextual targeting – such as health-focused content and relevant editorial environments – to boost message relevance even without detailed behavioural tracking.

The result? Better engagement, higher lead quality, and a campaign strategy that’s resilient to data loss.

What to Do When Data Is Scarce

If your business doesn’t generate first-party data at scale, you’re not alone. But that doesn’t mean you have to settle for blunt targeting and guesswork.

Here’s what we recommend:

• Start with personas: Build real, nuanced customer models. Not everyone fits in a neat age or income bracket.
• Mine real feedback: Reviews and support logs are goldmines for emotional insight and unmet needs.
• Use intent signals creatively: Context, search, and page-level behaviour can tell you more than a cookie ever could.
• Design creative for real people: Speak to the mindset, not the demographic.
• Plan journeys before channels: Map out when, where, and how customers are most receptive – then let the media follow.

At Harvest, we’ve helped brands across finance, healthcare and home mobility succeed in low-data environments.

Because when you don’t have the data, you need the insight.

And we can help you find it.