What started as a he-said-she-said dispute between a buzzy shopping startup and a major news investigation has now become something far more damaging: a paper trail. Leaked internal messages reveal that Phia co-founders Phoebe Gates and Sophia Kianni were aware their platform was engaging in cookie stuffing as far back as December, months before the company publicly claimed it had no idea the practice was happening.
What Cookie Stuffing Actually Means for Retailers
Cookie stuffing is not a minor technical glitch. It is a form of affiliate fraud where a platform claims commission credit for purchases it had no genuine role in driving. When a shopper buys a pair of Nike sneakers or a Nordstrom jacket through their own initiative, cookie stuffing allows a third-party app like Phia to insert itself into that transaction and collect a referral fee it did not earn.
For retailers, this translates directly into lost marketing budget. Affiliate programs exist to reward platforms that actually influence purchasing decisions. When bad actors manipulate those systems, brands end up overpaying for traffic that was never generated. Nike and Nordstrom are among the retailers now confirmed to have been affected. Given that the global affiliate marketing industry was valued at roughly $18.5 billion in 2024, the financial stakes of widespread cookie stuffing are significant across the entire ecosystem.
The Timeline Tells a Troubling Story
When the cookie stuffing issue first surfaced publicly in July, Phia initially described it as a bug, an innocent technical error that the team was scrambling to fix. That framing now looks untenable. Leaked Slack messages show the co-founders discussing the practice directly with engineers and executives, and subsequent reporting confirms that cookie stuffing was a feature that could be deliberately toggled on and off, not an accidental misfire in the codebase.
The financial consequences of stopping the practice are telling. Phia saw a meaningful drop in daily revenue once it discontinued cookie stuffing, which signals just how central the practice had become to the company’s business model. That is not the footprint of an obscure bug. It is the footprint of a revenue strategy.
The fallout has been swift and compounding. The company has shed close to half its full-time workforce since the start of the year. Multiple brand partners say they were not aware their products were even listed on the app. Investor confidence has eroded visibly, and earlier controversies around unauthorized data collection have added further weight to the pattern of behavior critics are now pointing to.
What This Means for Shoppers and the Broader Market
For consumers, this story is a reminder that not every shopping tool promising to find you the best price is operating in your interest. Understanding how affiliate platforms actually make money is increasingly relevant to smart buying decisions. When a shopping app’s business model depends on claiming credit for purchases you would have made anyway, its incentives are not aligned with yours. Buyers who want transparency and genuine value should pay close attention to how their favorite deal-finding apps generate revenue before trusting them with their shopping habits.
