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ARTICLE · 07 OCTOBER 2026

THE PHIA COOKIE STUFFING CONTROVERSY: What Businesses Should Know

Phia, the shopping app founded by Phoebe Gates and Sophia Kianni, faced allegations of cookie stuffing after Bloomberg discovered its browser extension was automatically placing affiliate tracking...

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Hi CIPA World! Before joining Troutman Amin, I kept up with a controversy involving Phia Holdings, Inc. (“Phia”), the company founded by Phoebe Gates (yes, that Gates) and Sophia Kianni. The popular shopping app and browser extension, Phia, helps shoppers find the best deals and alternative options across thousands of online retailers. But this summer, Phia drew attention for a different reason after Bloomberg reported that its browser extension was engaging in cookie stuffing. 

In affiliate marketing, publishers generally earn a commission for referring consumers to retailers when those referrals result in purchases. Cookie stuffing can manipulate that process by allowing an affiliate to receive credit for a purchase even when the consumer did not actually use that affiliate to reach the retailer. 

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