Polymarket Dismisses Chief Marketing Officer Matthew Modabber After Internal Probe

Polymarket has dismissed Matthew Modabber, its chief marketing officer since January 2024. The prediction market platform ended his employment following an internal probe into multiple embarrassing episodes that alarmed investors, as first reported by The New York Post. Sources indicated the company is finalizing a separation agreement, with both sides maintaining mutual respect. No public statements have come from Polymarket or Modabber.

Triggers in Marketing Practices and Payments

The review centered on a June Wall Street Journal exposé that revealed Modabber’s team built a fake webpage to promote videos of users winning on phony trades. Some clips falsely showed customers winning about $1.9 million as part of efforts to attract new users. The U.S. Commodity Futures Trading Commission opened an investigation that continues, with no wrongdoing established. Polymarket had told the Journal it was committed to accurate, fair, and transparent markets and would audit its promotional content.

A Politico investigation found more than $2.5 million flowed through Modabber’s personal PayPal account, registered to an email for Salad House, the Italy-based salad chain he co-founded. The payments went to over 800 recipients between January 2025 and February 2026, with at least $350,000 directed to identified influencers. Reports stated Modabber paid these influencers to promote Polymarket without disclosing the partnerships.

Modabber maintained a close alliance with Shayne Coplan, the 28-year-old CEO. The two attended the Beacon School together. Insiders described impulsive decisions that created public relations problems and noted a rift between loyalists and other employees plus investors who viewed Modabber as a liability. The probe also examined his ties to influencers such as Clavicular, including a nightclub video that raised questions.

Board Focus on Corporate Maturity

Polymarket’s board includes Coplan, crypto investor Nick Tomaino, corporate lawyer Alex Spiro, and an unidentified partner at Peter Thiel’s Founders Fund. The board concluded Modabber obstructed the company’s push to shed its startup image while eyeing a possible IPO. Investors have grown more active: a Bloomberg report noted Founders Fund required stronger financial controls before further commitments. In August the marketing team was restructured, with the founder of e-scooter startup Bird brought in to lead it.

Modabber’s LinkedIn profile identifies him as employee number 11 and credits him with lifting daily volume from $300,000 to mid 9-figure levels. Polymarket had been prohibited from serving U.S. customers in January 2022 after settling allegations of operating an unregistered derivatives platform; it later acquired a CFTC-regulated exchange to regain access.

The board’s acceptance of the split, despite the personal relationship between Coplan and Modabber, shows the priority now placed on governance and reputation controls. This decision carries direct costs in talent and internal friction but limits further exposure on compliance and disclosure issues that have drawn regulatory attention.

Reporting: World Casino News

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