Arbitrum's ARB token surged over 30% in 24 hours, breaking out of its $0.07–$0.10 range to trade near $0.11–$0.12, after Robinhood Chain — the Ethereum layer-2 built on Arbitrum's tech — posted record daily revenue of roughly $1.9–2.6 million. Under their revenue-sharing deal, 10% of Robinhood Chain's net protocol revenue flows back to the Arbitrum ecosystem (8% to the DAO treasury, 2% to the Developer Guild), sending an estimated $175K–190K to Arbitrum in a single day. Trading volume jumped roughly 8x, and open interest climbed past $88 million as traders piled into the momentum.$#ARBRises30%OnRobinhoodChainRevenue