From Member Retention to Weak Engagement: 5 Marketing Mistakes That Are Destroying Your Profit

Whether you’re driving gym memberships or selling supplements online, these five missteps—from flawed attribution to weak creative—are quietly eroding margins and limiting growth

I’ve had the privilege of being on the bleeding edge of every major media and marketing platform shift for the past 25 years. The rise of mobile. Smartphones. Facebook and Instagram. The evolution of algorithms, SEO, ad ecosystems, DSPs, PMPs, all of it. And I’ve been a part of most of these changes at the highest level.

After building and operating businesses in digital media and commerce for more than two decades, and generating billions in revenue along the way, I wanted to share what most people won’t: honest, actionable advice on what actually matters and what to focus on. I hope it’s helpful.

It doesn’t matter if you’re doing $5 million or $250 million. Across all of that, the media side, the commerce side, the paid side, I keep seeing the same five mistakes that destroy profit. 

These are the ones that quietly bleed you dry and keep you from hitting targets.

1. You don’t actually know what it costs to acquire a customer

Most brands look at a blended ROAS number and think that’s their barometer of success. It’s not. That number is a lie. Brand search is inflating your Google performance. Retargeting is taking credit for customers you already paid to acquire. And the platforms, Meta, Google, all of them, are designed to make you feel good about your spend, not to tell you the truth about the underlying data.

Here’s what actually matters: separate your brand spend from non-brand. Isolate your new customer acquisition cost. Then make decisions based on contribution margin, not ROAS, and not what the dashboard says. Contribution margin. Always. I’ve walked into accounts where the brand thought it was acquiring customers at $30. Once we cleaned up the data and looked underneath, it was north of $80. That’s not a small miss whatsoever. That is a broken business model hiding behind good-looking reports.

2. You handed your strategy to the algorithm and called it a day

Advantage+. Performance Max. Broad targeting powered by AI. The platforms want you to hand over the keys, sit back, and trust the machine. And it works… until it doesn’t. The algorithm doesn’t usually optimize for your most profitable customer. It optimizes for the easiest in-platform conversion. It will happily burn your budget on low-value buyers and people who just Googled your brand name. And it won’t tell you that’s what it’s doing.

The brands that win don’t fight automation. They feed it better inputs. Better creative. Better offers. Better data. A clear picture of which customers are worth acquiring and what they’re actually worth over time. Automation is a tool. It is not a strategy. The second you confuse those two things, your margins start compressing and nobody in the building can explain why.

3. You treat creative like a production task instead of the thing that actually drives growth

This is the one nobody wants to hear. In 2026, creative is the single most important variable in paid media. Full stop. Every brand is running the same algorithmic buying on the same platforms with the same bidding strategies. The only real differentiator left is the message. And yet most companies still treat creative like an assembly line. They pump out assets, toss them in the ad account, and see what sticks. That really is not a strategy, it’s a slot machine.

What actually works is the opposite. You go to your customers, their reviews, their support tickets, their exact words and objections, and you build creative around those real people. Not around what your internal team assumes the message should be. You build customer avatars rooted in actual belief systems. You test with structure. You iterate with purpose. The brands that run their accounts this way outperform brands spending two and three times more. Every single time.

4. You’re drowning in data and starving for clarity

Dashboards everywhere. Weekly reports nobody reads. Three attribution tools that all say something different. If this sounds like your company, you don’t have a data problem. You have a thinking problem.

The brands that grow profitably can answer three questions at any given moment: What’s our contribution margin by channel? Where are we hitting diminishing returns? And are we on pace with the plan? That’s it. Everything else is noise. I’ve been inside nine-figure businesses that couldn’t answer a single one of those questions. Every one of them was wondering why growth had stalled. Kill the vanity metrics. Build a measurement framework you can actually make decisions from, not a dashboard that exists to make your Monday standup feel productive.

5. You’re calling a hope a forecast

Most brands set a revenue target at the beginning of the year and then cross their fingers that paid media gets them there. No weighted revenue by channel such as email, organic, affiliate, paid. No scenario modeling. No idea what happens to the P&L if CPMs jump 15% or if that last AI-generated static campaign bombed, yet again. That’s not a plan. 

A real forecast tells you when to push, when to pull back, and when someone on your team is feeding you optimism instead of math. If you can’t model the outcome before you spend the money, you’re not managing growth. You’re just gambling with it.

None of these mistakes will kill your business overnight. But they compound. They quietly eat your margin while the topline looks fine. And by the time you notice, you’ve left a lot of money on the table and it’s much harder to get back to plan.

The brands that scale profitably aren’t always the ones with the biggest budgets. They’re the ones with the clearest thinking, a growth partner they can trust, and the ability to test, experiment, prospect, build, and take advantage of the landscape as it exists today. You can’t run a 15-year-old playbook and expect it to work.

I started Boy Genius Report at 17 years old and built it into one of the biggest news and technology destinations on the internet, largely off the back of organic SEO and an obsessive focus on understanding what content people actually wanted to read and engage with. I sold BGR to one of the largest private media companies in the world. In the years that followed, I helped pioneer the editorialization of commerce content, which became one of the most sizable modern revenue drivers for digital media brands. 

The model of turning product recommendations and reviews into real editorial content became a lifeline for publishers and digital properties everywhere. It’s now a trillion-dollar category.

After that chapter, I launched Lower Cross, and I’ve been doing what I love most: helping great businesses and incredible teams strengthen their digital growth and performance, with a specific focus on efficiency, bolstering profit and contribution, and creating systems that maximize scale and amplify leverage. I’ve had the opportunity to work with some of the best brands in the world across apparel, fitness, consumer electronics, health and wellness, CPG, and more.

We’re a senior-only team that has flipped the entire marketing agency model on its head. We align our incentives to the north star of your business so that as you grow, we participate. We actually care about your performance, and we do what we say we’re going to do. That shouldn’t be a differentiator, but in this industry, it is.

Jonathan Geller is the Founder and CEO of Lower Cross, a digital growth and strategy firm partnering with DTC brands and private equity portfolio companies in the $5M-$250M revenue range. Lower Cross works with leading companies across apparel, fitness, consumer electronics, health and wellness, and B2B, specializing in contribution margin-driven growth across all marketing channels.

Previously, Geller founded Boy Genius Report (BGR), building it into one of the largest technology news destinations on the internet before selling BGR to Penske Media Corporation. His work has been cited by Ad Age, ADWEEK, The New York Times, The Wall Street Journal, CNN, CNBC, Fox News, and hundreds of other major outlets.