Something is moving inside Amazon’s Marketplace organization, and it’s making some of the largest third-party sellers in the country very nervous. Over the past three weeks, screenshots of what appear to be internal Amazon planning documents — allegedly tied to an initiative internally dubbed “Project Nile” — have been circulating in private Slack channels and Discord servers frequented by high-volume FBA sellers. The documents, whose authenticity has not been independently verified, describe a restructuring of referral fees, FBA fulfillment rates, and the weighting mechanism behind the Buy Box algorithm that could fundamentally change how third-party sellers compete on the platform.
Sources close to the matter say the internal initiative has been in development since at least Q3 2025, and that Amazon’s Marketplace team has quietly piloted elements of it in select product categories — including home goods and sporting equipment — over the past six months without seller-facing disclosure. Amazon declined to comment for this story.
What Is ‘Project Nile’ and Where Did the Leak Come From?
The alleged documents first surfaced in a private seller community hosted on Circle, reportedly run by an aggregator-adjacent consulting group operating out of Austin. From there, screenshots spread rapidly to the r/AmazonSeller subreddit and several high-volume seller WhatsApp groups, where they were dissected in real time by operators managing anywhere from $2M to $40M in annual Amazon GMV.
According to the unverified materials, Project Nile encompasses three distinct changes:
- A tiered referral fee model that would penalize sellers with return rates above category-specific thresholds — reportedly 8% for electronics and 12% for apparel
- A revised Buy Box scoring layer that weights “delivery promise accuracy” more heavily than current price parity signals
- A new “Seller Health Composite” score that aggregates defect rate, listing quality, and PPC engagement into a single rank-influencing metric visible only to Amazon’s internal teams
A senior consultant at Acadia, the performance marketing agency that manages Amazon advertising for a number of eight-figure brands, told Ecommerce Times that several of his clients have already noticed anomalous Buy Box behavior consistent with what’s described in the alleged documents.
“We had three SKUs drop Buy Box share in the last 45 days with no pricing changes, no inventory disruptions, and no policy flags. When we dug into it, the delivery promise accuracy on those ASINs had dipped below 94% due to a carrier delay in Q1. If the documents are real, that’s the smoking gun.” — Senior Amazon consultant, Acadia (name withheld per company policy)
Are Aggregators the Most Exposed If This Is Real?
The rumored fee restructuring is drawing particular concern from the aggregator sector, which has spent the past two years trying to stabilize margins after the post-2022 correction that wiped out dozens of rollup firms. Thrasio, which completed its restructuring in late 2024 and has been quietly rebuilding under CEO Greg Greeley, reportedly convened an emergency internal review of its catalog exposure after the Project Nile screenshots began circulating, according to two sources familiar with the company’s operations.
Branded aggregators with high return-rate categories — particularly apparel and electronics — stand to lose the most under the alleged tiered referral fee model. One operator running a $15M apparel catalog on FBA, who asked to remain anonymous, said his current blended return rate sits at 14.2%, well above the 12% threshold described in the leaked documents.
“If that threshold is real and the penalty is even a 1.5 percentage point increase in referral fees, that’s a six-figure annual hit for my business overnight. And I’d have zero recourse because Amazon’s category return benchmarks are already way below what real-world fashion returns look like.” — Anonymous FBA apparel seller
Fortunately for some aggregators, sources say the changes are allegedly being phased in by category, not rolled out platform-wide simultaneously — which would give sellers a narrow window to restructure catalog strategy or push return reduction programs through tools like Returnly and Loop Returns before penalties kick in.
Is Amazon’s Buy Box Overhaul Connected to Its Carrier Partner Pressure Campaign?
Industry observers are noting a potentially uncomfortable timing correlation. In March 2026, Amazon Logistics quietly sent revised SLA expectation letters to a number of its Buy Shipping partner carriers, reportedly tightening “delivery promise accuracy” requirements from 95% to 97% for Prime-eligible volume. Sources at two regional carriers — both of whom requested anonymity — said Amazon threatened to deprioritize their Buy Shipping rate access if compliance wasn’t demonstrated by Q2.
If Project Nile’s alleged Buy Box scoring changes do weight delivery promise accuracy more heavily, sellers who rely on FBM through regional carriers rather than Amazon’s own logistics network could find themselves structurally disadvantaged — effectively forcing more volume into FBA, where Amazon captures the fulfillment margin.
“It’s a classic Amazon two-lever play,” said Jason Katzenback, co-founder of Amazing.com and a longtime Amazon seller educator who has been publicly tracking the leaked documents. “Tighten carrier SLAs, then adjust the algorithm to penalize poor delivery accuracy, and suddenly FBA looks like the only safe option even for sellers who’ve been successfully running FBM for years. Whether that’s intentional or not, the effect is the same.”
“I don’t think this is a conspiracy — I think this is Amazon optimizing its own P&L the same way it always has. But sellers need to read the directional signal clearly: the platform is slowly squeezing the economics of running independent fulfillment.” — Jason Katzenback, co-founder, Amazing.com
How Are PPC and Listing Optimization Agencies Responding to the Seller Health Composite Rumors?
The third alleged component of Project Nile — the “Seller Health Composite” score — is generating the most speculation among Amazon agency operators, particularly because it reportedly incorporates PPC engagement signals into organic rank. If accurate, this would represent a significant and largely undisclosed blurring of the line between paid and organic performance on the platform.
Tinuiti, which manages over $2 billion in Amazon media spend annually, declined to comment on the specific allegations. But sources within the Amazon agency community say conversations about PPC-to-organic signal bleed have been intensifying since at least January 2026, well before the Project Nile documents surfaced publicly.
Sellers and agencies are reportedly considering several defensive moves in response:
- Auditing ASIN-level “listing quality” scores in Seller Central and remediating flagged content before any new scoring layer activates
- Shifting PPC spend toward Sponsored Products over Sponsored Brands, on the theory that conversion-weighted campaign types are more likely to generate positive engagement signals
- Increasing focus on review velocity and verified purchase rates, which multiple agency insiders believe are inputs in any composite health model Amazon might build
- Pulling forward Q3 catalog rationalization decisions to drop low-margin, high-return ASINs before potential fee penalties materialize
Canopy Management CEO Brian Burt, whose agency manages Amazon advertising for a range of mid-market brands, was more measured in his public reaction but acknowledged the documents are being discussed at the highest levels of client strategy conversations.
“We’re not panicking, but we’re also not ignoring it. The smart play is to assume Amazon is always moving toward greater control over organic ranking signals, because historically that’s exactly what they do. Whether these specific documents are real or not, the strategic direction they describe is consistent with where the platform has been heading for three years.” — Brian Burt, CEO, Canopy Management
What’s the Timeline, and Is Amazon Preparing a Formal Announcement?
The question every seller community is asking right now is when — or whether — Amazon will formalize any of these changes through official Seller Central communications. Historically, Amazon has rolled out significant fee and algorithm changes with 30 to 60 days of advance notice posted in Seller Central news, though enforcement timelines have sometimes slipped quietly.
Sources close to Amazon’s Marketplace policy team — speaking strictly on condition of anonymity — say an internal review process is underway and that any formal rollout would require sign-off from Amazon’s WW Stores leadership. As of press time, no formal announcement has been made and no confirmed rollout date has been communicated to sellers or agencies.
What is clear is that the third-party seller community’s tolerance for opacity on fee structure and algorithm changes is at an all-time low. Multiple large sellers told Ecommerce Times they have accelerated investments in Walmart Marketplace and direct-to-consumer channels specifically as a hedge against what they describe as “Amazon’s unpredictable policy environment.”
Walmart’s marketplace team, for its part, has been actively courting displaced Amazon seller attention. In April 2026, Walmart Connect hosted a private seller summit in Bentonville that reportedly drew over 200 mid-to-large FBA sellers exploring diversification — a number that Walmart marketplace insiders described as “three times what we expected.”
Whether Project Nile is a real initiative, a misread of internal planning materials, or something in between, the chilling effect on seller confidence is already measurable. And in a marketplace ecosystem where trust is the thin line between retention and flight, that may matter more than the documents themselves.
