---
id: "contrarian-conversion-rate-divergence"
type: "contrarian-insight"
source_timestamps: ["§ What We Found", "¶23"]
tags: ["cro", "marketing-strategy", "contrarian"]
related: ["concept-human-centric-persuasion", "claim-traditional-marketing-fails"]
challenges: "The foundational belief in e-commerce that universally proven CRO tactics (like scarcity and anchoring) are universally beneficial to apply."
sources: ["geo"]
sourceVaultSlug: "hbr-seg-geo"
originDay: 3
articleStem: "hbr-tier2-06-ai-shopping-agents"
sourceUrl: "https://hbr.org/2026/05/research-traditional-marketing-doesnt-work-on-ai-shopping-agents"
sourceTitle: "Research: Traditional Marketing Doesn’t Work on AI Shopping Agents"
---
# Tactics that increase human conversion can decrease AI conversion

**Contrarian insight — challenges:** the foundational e-commerce belief that universally "proven" CRO tactics (scarcity, anchoring, strike-through pricing) are universally beneficial.

**Conventional wisdom:** Conversion Rate Optimization (CRO) best practice holds that adding scarcity badges or strike-through pricing *increases* conversion.

**What the research shows:** Applying these proven-for-humans tactics to [[concept-ai-shopping-agents|AI agents]] can **actively reduce selection rates** (see [[claim-traditional-marketing-fails]] and [[concept-human-centric-persuasion]]). The unsettling implication: **optimizing for humans can simultaneously de-optimize for AI** — and vice versa. On platforms where agents are a growing share of traffic, the two goals can pull in opposite directions.

**Practical consequence:** This is what makes [[quote-dial-it-back|"dialing persuasion back"]] a real strategic move rather than a paradox, and why a **single unified page for all traffic** is increasingly untenable (motivating [[concept-dynamic-agent-tailoring|dynamic agent tailoring]]).

**Enrichment context:** ACES/ACE further shows that platform levers and position biases can dominate choice, so simply layering *more* traditional CRO elements is not guaranteed to help and may interact unpredictably with agent decision logic.

**Related:** [[claim-traditional-marketing-fails]] · [[concept-human-centric-persuasion]] · [[quote-dial-it-back]] · [[concept-dynamic-agent-tailoring]]