Robinhood Chain gross revenue surged 20x from $54K on August 22 to $1.087M on August 30. During this revenue spike, Arbitrum scaled its cut proportionally via a percentage-of-revenue license (earning $108K on August 30), while Ethereum received a flat L1 data-posting cost that remained minimal ($155 on August 30). This structure allows Robinhood's net margins to expand on high-volume days because its underlying settlement costs do not scale with transaction volume.