Shopify announced on October 27 that its Promoted Placements beta now includes Shop Campaigns. Merchants running those campaigns with external platforms enabled can convert campaign settings into additional commission for participating catalog developers.

Buyers following those merchant-funded placements land in Shop, not your storefront.

This adds a paid acquisition path to AI product discovery. It also creates two numbers that should never be confused: what the referring developer earns and what you actually pay.

What Changed on October 27

Shopify opened catalog access to outside AI agents earlier in October. The new development is Shop Campaigns funding inside the promoted-placement flow, not the first appearance of AI product search.

The changelog says participating developers receive a combined commission rate including the merchant-funded component. Access is invitation-led, so this is not a universal rollout across every shopping assistant.

Developers earn through eligible catalog searches configured for the program. Check which advertising settings are active before assuming all catalog visibility is unpaid or that every AI referral carries the same economics.

Paid participation also does not establish that a shopper will see your product, choose it, or place an incremental order.

The Base Commission Is Not Your Rate Card

Shopify's promoted-placement documentation specifies a 0.3% developer base commission on eligible attributed purchases. Merchant-funded Shop Campaigns commission sits above that, limited to active US campaigns in USD, and paid only when checkout completes in the Shop app or on shop.com.

The documentation's example shows 1.5% total developer commission. On a $100 commissionable purchase, that is $1.50 to the developer including $0.30 at base.

It is not proof your merchant bill will be $1.50, or that every product uses that example rate.

Do not describe 0.3% as a new blanket fee on Shopify merchants. It is the documented developer payout. Your acquisition-cost settings and actual billing need separate review.

The same applies to checkout destination. The higher payout depends on the Shop purchase path, and a purchase elsewhere earns only the eligible base commission. More catalog discovery does not mean more visits to your own site.

Check Billing Before Raising Budget

Shopify's explanation of Shop Campaigns describes a conversion-based advertising program with an average customer acquisition cost that the merchant sets. That is a different pricing concept from the percentage returned to an agent developer.

The billing documentation says individual charges can run above or below your configured acquisition cost while trending toward it on average. It also says acquisition costs are not refunded when an attributed order is canceled or refunded.

That makes retained-order economics more useful than gross attributed revenue.

Take 100 acquired orders at $8 each, producing $800 in acquisition expense. If ten orders are later refunded and those charges stand, acquisition expense averages roughly $8.89 across the 90 retained orders, before return costs.

Neither figure predicts your campaign. The example shows how a campaign can hit its acquisition target while producing a worse result after returns.

Test Incrementality and the Customer Path

Start with a narrow product group and save campaign settings before changing them. Keep a comparison period or an untreated group where practical, and avoid changing prices, offers, and several channels at once.

Measure completed orders, retained revenue, contribution after advertising, repeat purchases, and refunds. Compare those against the campaign's attribution report rather than treating the report as proof of new demand.

Inspect the buyer's path. Check which product, variant, price, and delivery promise appear in Shop, and confirm the resulting order reaches your fulfillment and support systems with what your team needs.

Ask your agency to distinguish catalog traffic, paid attribution, and purchases that would likely have happened anyway. If your storefront carries sizing advice, bundles, or warranty information that matters to conversion, verify what survives when the transaction routes elsewhere.

Before expanding spend, reconcile a sample of campaign charges against actual orders and refunds. Watch for wider program access and merchant-level evidence of profitable incremental sales.

Until that evidence exists, treat paid AI discovery as a testable acquisition channel rather than a reason to increase the marketing budget.