A high NPS score feels like good news. But satisfaction and referral are not the same thing, and treating them as if they are costs businesses referrals they never even notice they are missing. This article looks at what actually predicts referral: not sentiment, but behaviour. It breaks advocacy down into four measurable dimensions, frequency, confidence, context and effort, and shows the three specific ways advocacy quietly breaks down inside otherwise healthy customer relationships: a trust gap, a visibility gap and an ease gap. Each one requires a different fix, and each one is costing pipeline long before anyone notices the cause. If you want to know whether your happiest customers are actually the ones sending you new business, this is where to start looking