Arbitrum achieved a historical revenue milestone in September, generating $5.45 million and surpassing all previous monthly records. The surge marks a significant financial benchmark for the Layer 2 network as it continues to expand its ecosystem activity. Orbit licensing fees accounted for the majority of this income, contributing $4.75 million to the total. This revenue spike correlates with heightened trading activity on the Robinhood chain during the same period, highlighting the growing monetization potential of Arbitrum's infrastructure services.