Why sticking to the channels that work is its own growth risk

Staying on the channels that already work feels like the safe choice. The dashboards look healthy and the budget is performing, so why risk it?

The risk is that “safe” has a ceiling, and the ceiling gets closer every month you spend against it. Over reliance on one or two channels is one of the best documented causes of plateaued growth. It is also one of the easiest to miss, because the channel keeps working right up to the point where it stops paying back. This article illustrates why channel concentration is a risk, and how to test new platforms without putting current performance at risk.

1. Every channel runs into the S-curve

Every paid media channel eventually hits audience saturation. Early spend finds the people most likely to buy. Later spend has to reach everyone else. Pumping more budget into a maximised channel pushes your Customer Acquisition Cost (CAC) up sharply for marginal gains. The channel is still working, but you have moved onto the flat part of the curve, where each extra pound buys less than the last.

2. One platform means one point of failure

Relying on a single platform leaves your revenue exposed to sudden algorithm updates, privacy policy shifts and unexpected CPC spikes. What works today can break tomorrow, and you rarely get notice. If 90% of your revenue runs through one channel, a change you didn’t choose and can’t influence becomes a business problem overnight. Diversification is how you stay in control when that change arrives.

3. Your customers are already moving

Concentrating solely on traditional search or social means missing high-intent users who are adopting new behaviours. Researching products through conversational AI is the clearest current example. Someone asking an AI assistant what to buy is often further down the funnel than someone scrolling a feed. If your ads only exist where people used to look, you are absent from part of the decision.

4. Early adopters get the arbitrage

New formats reward the people who arrive first. OpenAI has recently rolled out visual ad banners and an Ads Manager Beta, which let advertisers capture attention in an uncluttered environment. Competition drives bids up, and eventually arrives on every platform. Testing early means learning the platform before the auction gets crowded.

How can you test a new platform without disrupting what works?

The objection to testing is often that it’s putting the performance budget at risk. That’s why we recommend a 70-20-10 budget framework:

→ 70% to proven channels, ring fencing your core performance

→ 20% to scaling secondary channels, the next best performers that still have headroom

→ 10% strictly for experimental platforms such as OpenAI Ads

The downside is limited to 10% of the budget, and the potential reward could be huge. If the test fails, you have paid a relatively small price for the learning, but if it works, you hold a channel your competitors are ignoring.

Keep the 10% strict. An experiment that quietly grows into 30% of spend is no longer an experiment, and it starts to erode the 70% you were protecting.

What does this look like in practice?

OpenAI Ads became available in the UK on June 6th. Since then we have been running pilot campaigns across a number of our clients, working out what works and what doesn’t. The platform is evolving fast, and we are integrating its expanding suite of new features as they appear. That pace is part of the case for testing early, because you learn the platform as it develops rather than catching up once it has matured.

If you want the practical setup steps, follow our five-part OpenAI Ads series:

1. What you need to know before you set up OpenAI Ads: minimum spend (£15/day), the verified account, conversion tracking and creative requirements, and the trade-off of early access against a platform still missing some fundamentals.

2. How to get your product feed live on OpenAI Ads: how to send your existing Google Shopping feed via SFTP, the accepted formats and the required fields.

3. How to install the OpenAI Ads pixel on WordPress and WooCommerce: the base pixel and a once-per-order purchase tag, handled through the free WPCode plugin.

4. How to install the OpenAI Ads pixel on Shopify: the theme-level base pixel, plus choosing between Additional Scripts and Customer Events for purchase tracking.

5. Why should you set up OpenAI Ads? (video explainer): a whiteboard walkthrough of the whole journey, from account creation to pixel installation.