Phia, the shopping rewards startup founded by Phoebe Gates and Sophia Kianni, faces serious allegations of affiliate fraud. Bloomberg's investigation reveals the company engaged in "cookie stuffing," a deceptive practice where third-party cookies are injected into users' browsers without consent to claim credit for purchases the app didn't actually drive.

The scheme works like this. When shoppers use Phia to browse products but then complete purchases elsewhere, the cookie stuffing redirects credit back to Phia's affiliate partners. This allows the startup to collect commissions from retailers for sales it had no role in generating. Users remain unaware their browsing data is being manipulated to benefit the company's financial arrangements.

Phia launched with backing from major venture investors betting on the shopping rewards category. The app positioned itself as a cashback and rewards platform for conscious consumers, leveraging Gates' high-profile name to build credibility. The cookie stuffing revelation undermines that positioning entirely.

Affiliate fraud carries real consequences. Retailers lose money on fraudulent commission payouts. Consumers unwittingly participate in schemes that compromise their data and browser integrity. The practice violates the terms of service most affiliate networks enforce, exposing Phia to potential legal action and network bans.

The timing cuts deeper for the startup ecosystem. Gates' involvement brought mainstream attention and lent prestige to Phia's fundraising narrative. The cookie stuffing allegations now taint that story and invite scrutiny of other shopping reward platforms using similar affiliate models. Investors backing these companies face questions about whether due diligence caught these practices earlier.

Phia has not publicly responded to the allegations in detail. The company will likely face demands from affiliate networks to cease the practice immediately and potential claims from retailers seeking restitution for fraudulent commissions. This case exemplifies how startup growth incentives can encourage deceptive tactics