When launching a brand's first Amazon presence, seed the initial catalog with SKUs that already have proven demand in another channel (retail/trade/offline) rather than testing new products cold. Leanin' Tree Greeting Cards — a company selling through gift shops and trade since 1949 — picked its top 20 offline/trade sellers as its first Amazon SKUs, skipping speculative product-research entirely because retail sales history already validated demand. This differs from Generate 10-15 Candidates Before Committing and Two-Tier Product Research: Judgment for New Launches, Paid Validation for Listing Edits, which assume the seller is choosing among untested product ideas; here the research question ('will this sell?') is already answered by an existing sales channel, so launch effort concentrates on listing/SEO build and PPC rather than validation.