Phia Under Fire: Inside the "Cookie Stuffing" Controversy Rocking the Retail Tech Startup

By Tech Industry Correspondent
July 10, 2026

The high-flying shopping startup Phia, co-founded by Phoebe Gates and climate activist Sophia Kianni, is facing a severe crisis of credibility. Just months after securing a significant $40 million in funding and attracting a roster of celebrity investors including Kim Kardashian and Hailey Bieber, the company has been thrust into the center of an industry-wide scandal. A recent investigation by Bloomberg has exposed that the startup allegedly engaged in "cookie stuffing"—a deceptive digital marketing practice that allows companies to siphon affiliate commissions from sales they did not influence.

The fallout has been swift. Following the revelations, the industry giant Impact.com—a premier affiliate and influencer marketing platform—suspended Phia from its network. This development threatens to disrupt the startup’s revenue stream and has raised fundamental questions about the ethics of browser-extension-based shopping tools.

The Mechanics of the Allegation: What is Cookie Stuffing?

To understand the controversy, one must first understand the ecosystem of affiliate marketing. Affiliate programs are the lifeblood of many online retailers and media publishers. When a consumer clicks a referral link from a site like Wirecutter or an influencer’s social media page to make a purchase, that affiliate is credited with the sale and receives a small commission.

According to the Bloomberg report, Phia’s browser extension operated in a way that allegedly circumvented this standard procedure. The investigation—supported by findings from an independent consultant and a direct competitor—discovered that the Phia extension would silently open new browser tabs in the background while a user was shopping.

If a user had arrived at a retailer’s website organically or via a legitimate referral link from another publisher, the Phia extension would allegedly "inject" its own tracking code into the user’s browser session during the checkout process. By overwriting the existing referral attribution, Phia would effectively "steal" the credit for the transaction. In industry parlance, this is known as "cookie stuffing" or "clickjacking," and it is widely considered a fraudulent practice that undermines the trust between retailers, publishers, and consumers.

Chronology of the Rise and Fall of Phia

The trajectory of Phia has been meteoric, marked by high-profile launches and aggressive growth.

• Early 2025: Phia is founded by Phoebe Gates and Sophia Kianni with a vision to gamify and simplify the online shopping experience. The platform is marketed as a "Google Flights for shopping," designed to aggregate product prices and automatically apply discount codes.
• January 2026: The startup announces a massive $40 million funding round. The investment is notable not just for the amount, but for the star power involved, including Kim Kardashian and Hailey Bieber, which gave the brand an immediate, massive cultural footprint.
• Spring 2026: Phia scales its operations, integrating with hundreds of major online retailers and onboarding a large user base through its browser extension, which promises to save shoppers money at checkout.
• July 9, 2026: Bloomberg publishes its investigative report detailing the "cookie stuffing" allegations, citing evidence that the app was hijacking affiliate links from other publishers.
• July 10, 2026: The industry reacts. Impact.com suspends Phia’s access to its platform. Retailers and partners begin scrutinizing their contracts with the startup, and the company faces mounting pressure to explain the technical origins of the "background tabs" identified in the report.

The Broader Context: A History of "Dirty" Affiliate Tactics

Phia is not the first company to be accused of these tactics, nor is it likely to be the last. The affiliate marketing industry has long struggled with "bad actors" who use technical overrides to claim commissions.

The most famous precedent is the ongoing legal battle involving Honey, the browser extension giant now owned by PayPal. Honey has been the subject of a high-profile class-action lawsuit alleging similar practices. The industry has spent years attempting to implement "anti-stuffing" protocols, but as browser technologies evolve, so do the methods used by companies to force attribution in their favor.

For retailers, these practices are not just a nuisance; they are a financial drain. When a retailer pays a commission to a company that didn’t actually drive the traffic to their store, they are effectively paying for "phantom" marketing. This erodes the profit margins of retailers and punishes legitimate publishers—such as journalists and creators—who work to earn their commissions through authentic recommendations.

Official Responses and Remediation Efforts

As of the time of writing, Phia has remained largely silent regarding the specific technical accusations. While a spokesperson told Bloomberg that the company had "made all necessary changes" to address the issue, the company has not provided a detailed public explanation of how the code functioned in the first place or why it was implemented.

A follow-up check by Bloomberg confirmed that the background tab behavior appeared to be resolved, suggesting that Phia did push a software update to disable the mechanism. However, a technical fix does not necessarily equate to a brand fix. In the world of enterprise partnerships, trust is the primary currency. Retailers are now faced with the dilemma of whether to trust a company that, by its own admission, required a "fix" to stop the unauthorized redirection of affiliate traffic.

TechCrunch reached out to Phia for comment on the suspension by Impact.com and the internal investigation into how this code was deployed, but the startup has yet to issue a formal response.

Implications: The Future of Affiliate Marketing

The controversy surrounding Phia signals a potential "reckoning" for the browser-extension shopping sector. For years, these tools have operated in a gray area of affiliate marketing. While they provide genuine value to the consumer by finding discounts and price comparisons, the line between "assisting a shopper" and "hijacking a sale" is razor-thin.

1. Regulatory Scrutiny

With major players like PayPal (via Honey) and high-profile startups like Phia facing scrutiny, it is likely that regulatory bodies, including the Federal Trade Commission (FTC), may begin to take a closer look at the transparency of browser extensions. Consumers have a right to know if their browsing data is being used to manipulate commercial transactions.

2. Retailer Pushback

Retailers are expected to become far more aggressive in their audits of affiliate partners. We can anticipate more stringent "terms of service" for affiliate programs, with automated monitoring systems designed to detect when a referral code is being overwritten or "stuffed" by a third-party extension.

3. The Challenge for Influencer Startups

Phia’s brand identity was built on the reputation of its founders and its celebrity backers. The accusation that the company was essentially "gaming the system" creates a significant reputational hurdle. For investors like Kardashian and Bieber, the incident raises difficult questions about due diligence: did the venture capital firms and celebrity backers fully understand the technical mechanics of the product they were promoting, or were they blinded by the promise of rapid growth?

4. Market Consolidation

The suspension from Impact.com is a critical blow. Being cut off from a major affiliate network makes it significantly harder for Phia to monetize its user base. If other networks follow suit, the startup may find its business model completely untenable in its current form.

Conclusion

The "cookie stuffing" scandal serves as a stark reminder that in the world of digital commerce, technical innovation must be balanced with ethical stewardship. While Phia promised to make shopping "fun again," the reality of its backend operations—as reported—suggests a far more cynical approach to business growth.

For now, the startup is in damage control mode. Whether the "fix" implemented by the company is enough to satisfy its partners and regulators remains to be seen. However, one thing is clear: the era of unchecked growth for browser-extension shopping tools is over. As the industry moves toward greater transparency, Phia will serve as a definitive case study in what happens when a company prioritizes short-term commission gains over the foundational trust of the digital ecosystem.