Measure Meta Ads Impact on Amazon Sales

1. What Meta claims: sales from people who saw or clicked your ad, many of whom would have bought anyway.
2. What Amazon Attribution credits: purchases after tagged clicks, missing later searches.
3. What you'd lose if you stopped: the number that decides profit. A holdout finds it.

Spillmark compares Amazon orders by ship-to state between regions with and without Meta.

Use the three numbers in that order. Meta's claim and Amazon Attribution's credit help with creative and tagging. Only the holdout number belongs in a budget decision. Starter at $49/mo runs one test at a time for brands doing up to $50k a month on Amazon.

1. Upload your reports, or connect. Start with the Seller Central, Amazon Ads, Meta and Shopify reports you already download, or connect with read-only access.
2. See profit by channel. Agents show sales minus Amazon fees, product costs and ad spend, with the math behind every number.
3. Plan a holdout you approve. Spillmark checks your order history to see whether a geo holdout can answer at your size. If it can, agents plan a test that pauses Meta in a few US states for 4 to 12 weeks and compares Amazon orders by ship-to state. Nothing pauses without your approval, and each test design is locked before it starts.

• Dashboard (free): report imports, profit by channel, and a pre-test check.
• Starter ($49/mo): for brands doing $0–$50k a month on Amazon. One holdout test at a time, locked experiment ledger, alerts.
• Growth ($199/mo): for brands doing $50k+ a month. Unlimited holdout tests, branded Amazon PPC tests, scored predictions.

Paid plans start with a 7-day trial for $0. Cancel anytime. Check current prices on spillmark.com.