Blockchain investigator ZachXBT has identified PolyArb as a fraudulent prediction market product, warning that its website contains a wallet stealer. PolyArb had previously claimed on the X platform that the Hyperliquid HIP-4 results market achieved a 48-hour BTC trading volume of $6.15 million. This claim was questioned by William LeGate, head of user growth, regarding Polymarket's fees. ZachXBT cautioned that engaging with the related account could increase exposure and potentially lead to more victims.