AI-era verification verdict — older click-based ROI/payback studies should be treated as UPPER BOUNDS and partially obsolete as of 2026

Claim: Older click-based ROI/payback studies should be treated as upper bounds and partially obsolete as of 2026. Zero-click search, AI Overviews, and AI Mode are materially compressing organic click-through; any pre-2024 payback study should be marked down accordingly.

Primary evidence anchoring the verdict:

• Bain & Company (Feb 19, 2025) — 15-25% organic traffic reduction; 60% of searches terminate without a click (Bain & Company (Feb 19, 2025, "Goodbye Clicks, Hello AI") — 80% of consumers rely on AI-written results for at least 40% of searches; organic web traffic reduced 15-25%; 60% of searches terminate without a click).
• Pew Research Center (Jul 22, 2025) — 8% click-through with AI summary vs 15% without (Pew Research Center (Jul 22, 2025; 68,879 real searches from 900 US adults) — 8% click-through on traditional links with AI summary present vs 15% without; roughly a halving).
• Ahrefs (Dec 2025, 300k keywords) — AI Overviews associated with ~34.5% click reduction (Ahrefs (Dec 2025, 300,000 keywords) — AI Overviews associated with ~34.5% reduction in clicks to top content).
• Gartner (Feb 2024) — predicted search engine volume would drop 25% by 2026 (Gartner (Feb 2024) predicted search engine volume would drop 25% by 2026 due to AI chatbots).

Implication for the J-curve: the invisible window may be effectively longer and the post-ramp ceiling lower for click-dependent businesses; some informational/top-funnel queries now resolve on the SERP with zero click. Owned-asset value increasingly includes being cited inside AI answers, not just ranking.

Source: Compass_artifact research document, June 2026; Bain, Pew, Ahrefs, Gartner.

Confidence: Industry-consensus, primary-sourced.

Caveat: Magnitudes vary widely by vertical/query type. Transactional/navigational/local queries still generate clicks at much higher rates than informational queries. The verdict applies most strongly to content/informational SEO ROI claims and least strongly to local-intent/transactional ROI.