A recent study warns that Ethereum rollups could misprice small transactions, potentially leading to increased costs and denial-of-service (DoS) risks. The research, conducted by zkSecurity, Prooflab, and Imperial College London, highlights that current fee formulas, which combine computation, data availability, and proof costs, may inflate costs for minor payments and enable spam attacks. The study examined rollups like Polygon zkEVM, zkSync Era, Scroll, Optimism, and Arbitrum, finding significant discrepancies in fee timing and refund behavior. These inconsistencies create exploitable incentives, posing a threat to the ecosystem as it scales. While some rollup teams are exploring adaptive fee models, the lack of a standardized approach leaves the network vulnerable.