The metric to watch is unattributed pipeline percentage — the proportion of won deals in the past 12 months where the originating marketing source is either missing, "direct/none," or listed as a catch-all channel that nobody actually campaigns to.
In our experience, the industry average is around 35–45% unattributed pipeline for companies without a dedicated RevOps function. For companies with RevOps, it drops to 15–25%. For companies with a well-governed attribution model and consistent UTM hygiene, it can be as low as 8–12%.
Why does this matter for diligence? Because a QoE is built on financial performance, not on the reliability of the marketing model that produced it. The revenue is real. The attribution of that revenue to specific channels and campaigns may be almost entirely fictional.
When attribution is broken, two things follow. First, marketing spend decisions are made on bad data — which means the company is likely over-investing in channels that look productive but aren't, and under-investing in channels that are actually driving revenue but aren't getting credit. Second, the revenue forecast embedded in the QoE assumes continued marketing performance — but if you don't know what drove performance historically, you can't reliably project it forward.
The question to ask in any diligence call: "What percentage of your won pipeline last year has a verified marketing source?" If the person across the table pauses before answering, you have your signal.
The remediation cost for attribution collapse is real but bounded: UTM governance implementation, offline conversion mapping, and attribution model rebaselining runs $40K–$80K over 6–8 weeks. The risk of not surfacing it pre-LOI is a 100-day plan that starts with a foundational rebuild rather than an acceleration play.