P&G just moved into your warehouse.

Amazon opened its full logistics network to every industry on May 4. The warehouses your fees built now have new tenants. Here's what to model before Q4.

On May 4, Amazon launched Amazon Supply Chain Services. The press release used words like "opening" and "expanding" and "businesses of all types and sizes."

Here's the translation: the warehouses your inventory sits in — the ones your fees built over the last decade — now have new tenants. Procter & Gamble. 3M. American Eagle. Lands' End. Healthcare companies. Automotive companies. Manufacturing companies. Anyone with a supply chain and a checkbook.

Your workflow didn't change. Your Seller Central dashboard looks the same. Amazon said so explicitly — no new fees, no migration, no action required.

That last part is technically true and strategically meaningless.

ASCS doesn't add capacity to the network. It adds customers to the network.

Amazon operates 80,000+ trailers, 24,000+ intermodal containers, and 100+ aircraft. That infrastructure is real — Amazon delivered more U.S. parcels than USPS in 2024. But that infrastructure was already running tight. Restock limits, low-inventory-level fees, inbound placement fees, capacity announcements before Black Friday — these aren't random policy decisions. They're signals that the network has been near its edges for years.

When a logistics network gets crowded, the operator has two levers: build more capacity, or raise prices. Amazon has been pulling both. Every year. For five years running.

Amazon Air Cargo expanded. Amazon Freight launched less-than-truckload service in January 2026. The warehouse footprint keeps growing. Amazon announced $4 billion to triple its delivery network by end of 2026.

But build-out and fee increases have never been substitutes. They've been partners. Every expansion year has also been a fee-increase year. There is no historical precedent for Amazon building out and not raising seller costs to help fund it.

Prime Day is moving to late June this year. That means the inventory wave that normally builds in August now starts in May. Add enterprise brands learning to flex their volume through ASCS during the same peak windows — Black Friday, Cyber Monday, Prime Day — and the competition for warehouse slots goes up before a single additional unit gets listed.

Inventory ceilings have a higher chance of biting this peak than any prior year. If you're modeling flat cost assumptions for Q4, those assumptions have been wrong every year since 2021. There's no reason 2026 breaks that streak.

Three things worth doing before June:

First — watch how Amazon talks about ASCS volume in the next earnings call. The signal you want is whether enterprise growth gets prioritized over marketplace fulfillment performance. If Amazon starts reporting ASCS volume as a growth metric, the capacity allocation conversation shifts permanently.

Second — stress-test your restock limits against a scenario where ceilings drop 10–15% from last peak. If that math breaks your Q4 plan, you have a 3PL diversification decision to make now, not in September.

Third — run the multi-channel numbers. ASCS is a real 3PL alternative for off-Amazon orders. If Amazon is going to price the network like a premium logistics service — and they will — you should know whether those rates work for your Shopify, Walmart, or DTC channels before you need them.

Rufus is dead. Alexa for Shopping just replaced it. On May 13, Amazon retired the Rufus chatbot and replaced it with Alexa for Shopping — a merger of Rufus's product knowledge and Alexa+'s personalization layer. 300 million customers used Rufus in 2025. The new assistant is now the default AI layer for every signed-in U.S. customer — no Prime or Echo required. It generates buying guides, compares products, tracks prices, and has an "Auto-Buy" feature that purchases automatically when a product hits a target price. If your listing copy isn't optimized for conversational AI queries, you're now invisible to the default discovery layer.

Ad credit card ban deferred to August 1 — not cancelled. The seller boycott in April won a delay, not a reversal. Amazon's exact words: "we're deferring this change until August 1, 2026, to give this group of advertisers more time to prepare." Reports suggest Amazon is offering affected accounts a $2,500/month click credit for five months ($12,500 total). Treat August 1 as the real deadline. Model the lost credit card rewards into your margin math now, not in July.

Amazon's PR narrative vs. seller reality. Amazon released its Small Business Empowerment Report during National Small Business Week (May 3–9), claiming 75,000+ sellers surpassed $1M in sales and sellers employ 2M+ people in the U.S. Meanwhile, Marketplace Pulse's 2026 Seller Index found 46% of sellers reported declining profit margins last year and 49% cited marketplace fees as their top cost pressure. Both things are true. The question is which number your P&L looks more like.

Open the Amazon app right now. Search for your top 3 products the way a customer would ask Alexa — use a full natural-language question, not a keyword string. Instead of "stainless steel water bottle," try "what's a good insulated water bottle that keeps drinks cold for 24 hours?"

See what gets surfaced. If it's not your listing, your copy isn't optimized for the AI discovery layer that 300 million customers are now using by default.

The fix: rewrite your bullet points to answer specific use-case questions, not to stuff keywords. Rufus (now Alexa for Shopping) pulls from bullet points, A+ content, and review text to generate answers. Spec-sheet bullets from 2019 won't surface. Conversational, benefit-driven copy will.

Do this for your top 5 ASINs this week. Screenshot the results. That's your AI readiness baseline.

I've been watching Amazon monetize its own infrastructure for a long time. The pattern is always the same: build it for internal use, open it to sellers, charge sellers to fund the build-out, then open it to the world and charge everyone more.

FBA started in 2006. Sellers have shipped 80 billion units through it since then. Third-party seller services — commissions, fulfillment, shipping, advertising — generated $172 billion for Amazon in 2025. That's an 11% increase year-over-year. Those fees built the network that Amazon is now selling to Fortune 500 companies.

The infrastructure sellers funded is now being sold to P&G and 3M. The bill for building it keeps showing up in your fee statement. That's not a conspiracy theory. It's the business model, stated in plain English on Amazon's ASCS landing page.

Your workflow didn't change on May 4. Your cost structure will.

Have any questions? Grab a 15-minute slot here: book a time here.

— Dan