We have all felt it. You log into your Facebook Ads Manager or Google Ads dashboard and see a campaign with a 5.0 ROAS<\/strong> (Return on Ad Spend). You put in $1, and you got $5 back. It feels amazing. It feels like printing money.<\/p>\n So, you do the logical thing: you double the budget. You wait for sales to double. But they don\u2019t. Maybe they go up by 10%, or maybe they don\u2019t move at all. You stare at the dashboard, confused. The dashboard says you made money. Your bank account says you spent money. Who is lying?<\/p>\n The problem isn\u2019t that the data is wrong; it\u2019s that the attribution<\/strong> is greedy. To understand why, let\u2019s look at the “Doorman Fallacy.”<\/p>\n Imagine you own a popular nightclub. You hire a doorman and pay him $1 for every person he counts walking inside. At the end of the night, he claims he brought in 500 people. He demands $500. <\/p>\n But here is the catch: those people were already in line.<\/strong> They were coming in whether the doorman was there or not. He didn\u2019t generate<\/em> the traffic; he just claimed<\/em> it.<\/p>\n This is exactly how Retargeting<\/strong> and Branded Search<\/strong> campaigns often work. If someone searches for your brand name on Google, they are already in line. If you pay for an ad to sit at the top of that search result, Google will claim credit for the sale. But that sale was likely going to happen anyway (organically).<\/p>\n This is where Bayesian Marketing Mix Modeling (MMM)<\/strong> changes the game. Unlike platform dashboards, which fight to claim credit, MMM measures Incrementality<\/strong>.<\/p>\n Incrementality asks a simple, brutal question: “If we turned this ad off, would these sales disappear?”<\/em><\/p>\n When you use a tool like OptiMix<\/strong>, you might discover that your “best performing” Facebook campaign is actually just a digital doorman, taxing customers who were already going to buy. Meanwhile, a “low performing” YouTube campaign might be the one actually convincing strangers to get in line.<\/p>\n Stop scaling based on vanity metrics. Here is how to start spending on truth:<\/p>\n High ROAS is seductive, but Incremental ROI<\/strong> is what pays the bills. If you are ready to see which of your ads are working and which are just standing by the door, it\u2019s time to move beyond the dashboard.<\/p>\n A “good” ROAS depends on your profit margins, but typically a 4:1 ratio is considered healthy for e-commerce. However, a high ROAS on branded search is often misleading (low incrementality).<\/p>\n MMM uses statistical regression to isolate the impact of media spend on sales, controlling for seasonality and trends. It calculates the lift generated above<\/em> your baseline organic sales.<\/p>\nThe Doorman Fallacy: Why Attribution Fails<\/h2>\n
Incrementality: The Only Metric That Matters<\/h2>\n
How to Fix Your Budget Today<\/h2>\n
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Stop Paying the Doorman<\/h2>\n
Frequently Asked Questions<\/h2>\n
What is a good ROAS?<\/h3>\n
How does MMM measure incrementality?<\/h3>\n
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