The hardest question in AEO is not whether it works. It is proving that it does.
A higher visibility score is a fine story for the marketing team. It is a weak one for finance. The traffic AI sends you is real, but it arrives without a clean label, your normal analytics files most of it under 'direct,' and nobody can draw a straight line from a citation to a closed deal.
You cannot see the traffic
Most AI engines do not pass a clean referrer. A click from ChatGPT or Perplexity often lands as 'direct,' lumped in with people who typed your address. The visit is real and the source is gone.
You cannot value it
Even when you spot AI traffic, connecting that visit to a lead, an opportunity, and revenue means stitching three tools together by hand. Most teams never finish the spreadsheet.
You cannot defend the budget
Without a number tying AI search to pipeline, the program is easy to cut and hard to grow. You are funding a channel you cannot put on a slide.

