If a test or new listing shows weak relevancy for a target keyword (see Pre-Launch Test-Listing Relevancy Validation), fix it by (a) adding the keyword to the title per A9 Title Keyword Weighting (Position & Phrase Match), (b) driving traffic to the listing, and (c) having 1–2 people search the keyword and buy the product ('search find buy') to generate a relevancy/purchase signal tied to that keyword. The seller in this source explicitly distinguishes this small, organic-looking version from the TOS-violating version of the same tactic run with organized groups of ~20+ people, which crosses into manipulation Amazon actively polices. This targets the A9 relevancy signal rather than review count/rating like Amazon Review Acquisition Tactics Risk Spectrum, but shares that spectrum's logic that TOS risk scales with organized group size.
Quote clarifying where the TOS line sits: "to do like one or two just to get some relevancy signals, that is not against what Amazon says... [but] trying to get 20 people to do search find buy for a keyword and trying [to] rank for that keyword, that is against Amazon terms of service." Apply: cap this at 1-2 purchases for a relevancy nudge; organizing a larger group (~20 people) to move rank crosses into manipulation and violates Amazon's terms.
One stated concrete boundary for where small-scale relevancy nudging crosses into manipulation: using search-find-buy with roughly 1–2 people is treated as a legitimate, small-scale relevancy signal, while scaling it to roughly 20 people is identified as crossing Amazon's TOS line into manipulation. A rare concrete number for a boundary usually described only qualitatively.