Zelenskyy's Wardrobe Causes Polymarket Betting Malfunction

Ukrainian leader Volodymyr Zelenskyy’s suit has sparked dispute, revealing flaws in Polymarket’s current oracle resolution system.

Ziv Chen - News Editor at Covers.com
Ziv Chen • News Editor
Jul 8, 2025 • 13:40 ET • 4 min read
Ukrainian President Volodymyr Zelensky at a press conference at Marselisborg Castle in Aarhus on Thursday, July 3, 2025. Denmark officially takes over the EU presidency. (Photo: Ida Marie Odgaard/Ritzau Scanpix) (Photo by Ritzau Scanpix/Sipa USA)
Photo By - SIPA. Ukrainian President Volodymyr Zelensky at a press conference at Marselisborg Castle in Aarhus on Thursday, July 3, 2025. Denmark officially takes over the EU presidency. (Photo: Ida Marie Odgaard/Ritzau Scanpix) (Photo by Ritzau Scanpix/Sipa USA)

An apparently insignificant question regarding Ukrainian leader Volodymyr Zelenskyy's attire has subsequently expanded into a controversy that can damage trust in decentralized prediction markets. 

According to a recent Forbes article, blockchain market Polymarket and its use of Universal Market Access's (UMA) Optimistic Oracle to determine market results are turning the insignificant question into a multimillion-dollar ordeal. 

Key Takeaways

  • Ukrainian leader Volodymyr Zelenskyy’s suit has sparked dispute, revealing flaws in Polymarket’s current oracle resolution system
  • UMA’s token-based dispute mechanism may allow manipulation, lacking a transparent, verifiable appeal process
  • Polymarket nears $1 billion valuation as it partners with X and gains global user traction

Polymarket users were able to bet as to whether or not Zelenskyy would don a suit by July. When Ukrainian president arrived at the NATO Summit in The Hague on June 24 in attire generally considered to be formal clothing, some presumed that the market had given its verdict.

Fashion experts such as Derek Guy and the outfit's designer confirmed it as a suit. Even a Polymarket-affiliated social media account voted for the "Yes" side in its early days.

The result was, however, put into question. The challenge to Polymarket's system goes as high as UMA's Oracle, which defaults on token-holders voting via its Data Verification Mechanism (DVM) as a last resort. In theory, economic sanctions for corruption start here. In practice, the hitch is that no transparent and tested appeal system exists outside of the DVM.

The possible victory of a "No" campaign, after unanimous consensus by experts, has been widely criticized. Opponents have argued that a system can be manipulated through well-funded players or manipulated according to token dynamics instead of facts.

The episode has sparked speculation that outside interests will seek to question or seek to dictate Polymarket's credentials. Speculations have been made unsubstantiated that competitors will buy losing positions as a trigger for legal actions. 

Larger concerns reside with wondering if decentralized oracle systems can convey objective subjects with clarity and fairness.

Polymarket to hit $1 billion valuation as market surges

The controversy comes amid the news that Polymarket is set to raise a reporteded $200 million funding round that would place a $1 billion valuation on the platform. 

Approximately $50 million has been raised before. According to reports, this round is led by Founders Fund, a venture firm owned by Peter Thiel.

The injection of funds reflects increased buzz about event-driven investing amid surging macroeconomic and geopolitical risks. Volumes are increasing despite Polymarket's prohibition of users from within the U.S.

User activity has been on a tear globally, and 15.9 million visitors came to Polymarket in May 2025, according to SimilarWeb data, outpacing FanDuel and DraftKings. 

X and Polymarket Enter Strategic Partnership

Prior to its $1 billion funding valuation, social media platform X and Polymarket made a strategic announcement that real-time prediction data would be fed directly into X's interface. 

This move was made to integrate social interaction and event-driven financial markets.

The partnership offers real-time data feeds, advanced Grok AI annotation, and automatic mapping of corresponding market actions into popular subjects. Polymarket CEO Shayne Coplan cited the partnership's goal of offering contextual betting information to worldwide users.

No financials were provided, though technology complexity would imply a seismic change in users' access and manipulation of market predictions.

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Ziv Chen
News Editor

Ziv has been deep in the iGaming trenches for over 20 years, long before most people could spell "geolocation compliance." With a background in marketing and business development at some of the biggest names in gambling tech, Ziv knows the industry from the inside out. Since joining Covers, he's turned his sharp eye (and sharper keyboard) toward everything happening in the fast-moving world of online gambling. Whether it's new state launches, the latest twists in regulation, or what the big operators and game providers are cooking up next, Ziv breaks it all down with clarity, context, and just the right amount of snark. He covers the business side of betting, from affiliate trends and revenue reports to the tech powering your favorite slots. His motto in writing is “let’s make it make sense without putting you to sleep.”

When he’s not tracking gambling legislation or looking for the next breaking story, Ziv is living and dying with every pitch and play from his beloved Pittsburgh Steelers, Pirates, and Penguins. As a Pitt graduate, it’s a city loyalty forged in heartbreak, but one he wouldn’t trade for anything, except maybe a few more playoff wins.

When away from the keyboard, Ziv loves to hit the road and soak up the energy of casinos. Whether strolling the neon jungle called the Vegas Strip, or wandering into a smoky riverboat casino in the Midwest, Ziv’s in his element. He’s the guy chatting with players, blackjack dealers, and asking pit bosses way too many questions, all in the name of “research,” of course. The casino floor isn’t just his workplace, it’s a weird and wonderful ecosystem of flashing lights, wild characters, and pure sensory overload, and he wouldn’t have it any other way.

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