Woofun AI reports that the deployment of Robinhood Chain on Arbitrum Orbit has reignited market interest in the Arbitrum Expansion Plan, driving a sharp 20% increase in ARB valuation. This market reaction, documented by angelilu for Foresight News during the London launch event on July 1, marks the first significant activation of the AEP revenue-sharing mechanism in 18 months. The catalyst is not merely the technical integration but the entry of a major Traditional Finance brand into the Arbitrum ecosystem, forcing a re-evaluation of the dormant distribution rules that funnel tenant revenue back to the ArbitrumDAO treasury.

The immediate market response was reflected in the price action of ARB, which touched $0.094 during trading sessions, representing a near 20% gain over the past week. This performance positioned ARB among the top-performing mainstream Layer2 tokens during the same period. The surge was directly correlated with the mainnet launch of the Robinhood Chain, an RWA-focused Layer2 built on Arbitrum technology. The market’s enthusiasm stems from the realization that a heavyweight TradFi entity is now subject to the previously underutilized distribution mechanism, where a portion of the chain’s revenue is automatically directed to the Arbitrum ecosystem. This event has transformed a theoretical revenue stream into a tangible financial expectation for token holders.

Structurally, the revived mechanism is known as the Arbitrum Expansion Plan (AEP), a framework introduced in January 2024 by the Arbitrum Foundation in collaboration with Offchain Labs. The AEP establishes a clear revenue-sharing logic for independent chains built using Arbitrum Orbit technology. Specifically, any chain that settles directly on Ethereum or Base, rather than on Arbitrum One or Nova, is required to allocate 10% of its net protocol revenue to the Arbitrum ecosystem. Of this 10% share, 8% is directed to the DAO treasury, while the remaining 2% is distributed to developer guilds. In contrast, L3 chains that settle back onto Arbitrum One or Nova, such as Xai and Sanko, are exempt from this fee structure, allowing them to maintain their status as top-tier ecosystem members without revenue leakage. This distinction creates a bifurcated incentive structure for chain builders within the Orbit network.

Per Woofun AI, the significance of Robinhood Chain lies in its scale compared to previous AEP participants. Earlier chains such as Degen Chain, Onyx, and Flynet, which settled on Base, had already been paying the 10% share, but their modest transaction volumes rendered the revenue contributions negligible. Robinhood Chain, however, represents the first major chain to generate substantial amounts under this rule. Data provided by Johann, head of international and cryptocurrency operations at Robinhood, indicates that as of July 10, just over a week after launch, the chain had processed over 17 million transactions. During this period, more than 350,000 unique addresses interacted with the network, while Total Value Locked (TVL) reached approximately $250 million.

Additionally, Decentralized Exchange (DEX) trading volume exceeded $1 billion, demonstrating robust initial adoption and liquidity depth.

Despite these impressive activity metrics, the actual revenue generated remains relatively small in absolute terms. At the time of reporting, Robinhood Chain’s total protocol revenue stood at approximately $147,000. After deducting the costs associated with settling data back onto the Ethereum L1, the net available revenue was only $146,000. Applying the 10% AEP allocation to the Arbitrum DAO results in a modest contribution, highlighting the gap between transaction volume and protocol profitability.

However, the market’s premium valuation of ARB reflects expectations of future expansion rather than current cash flows. Robinhood’s platform holds total assets worth around $324 billion and managed assets valued at approximately $143.6 billion. With over 2,000 tokenized stocks covering 120 countries already existing off-chain, the potential for on-chain settlement is vast. If these assets gradually migrate to the blockchain, the current $57,000 base for revenue sharing could scale significantly, transforming the AEP from a symbolic gesture into a major income source.

In contrast to Arbitrum’s recent success, Optimism’s rental model has faced declining revenues and tenant attrition. The Optimism Collective collects rents from Superchain member chains, including Base, Zora, Mode, and Unichain, through the OP Stack. The fee structure charges 2.5% of sequencer revenue or 15% of net profit, whichever is higher, with OP Mainnet also contributing its net income to the treasury.

However, rental fees have been steadily decreasing, dropping to around $2.9 million in the first quarter of 2024, a 21.5% decline from $3.7 million in the previous quarter. Base alone contributed approximately $1.4 million to this total. The instability of this model was highlighted in February when Base announced its intention to leave the OP Stack. Given that Base accounted for around 96.5% of the collective’s revenue in terms of gas fee contributions, the announcement caused the OP token to plummet by 28% within two days, underscoring the risks of dependency on a single large tenant.

The parallel between Base’s exit and Robinhood Chain’s current position raises questions about retention risks for Arbitrum. Some analysts argue that Robinhood Chain may eventually follow the same path, leaving Arbitrum Orbit to align directly with Ethereum. Currently, Robinhood Chain’s daily sequencer revenue is approaching $60,000, second only to Base’s $72,000 among Ethereum L2 chains. This figure is nearly three times that of its parent chain, Arbitrum, indicating a significant shift in economic gravity.

Furthermore, Robinhood Chain has become the second-largest consumer of ETH-based DA on Ethereum, trailing only Base. Sequencers on this chain pay blob fees and settle in ETH, with those ETH permanently destroyed. This dynamic suggests that the primary beneficiary of the chain’s activity is ETH, rather than ARB.

The core tension lies in the ecosystem currency dominance. While the AEP mechanism ensures a flow of revenue to the ArbitrumDAO, the underlying economic activity is increasingly denominated in ETH. If Robinhood Chain continues to grow, the volume of ETH burned for data availability and settlement will likely outpace the revenue shared with Arbitrum. This creates a structural risk where the tenant’s success strengthens the parent chain’s competitor, Ethereum, rather than the host chain, Arbitrum. The market’s current optimism about ARB may be premature if the chain fails to retain its major tenants in the long term. The history of Base serves as a cautionary tale, illustrating how large chains can leverage their scale to negotiate better terms or exit unfavorable agreements. For Arbitrum to sustain its revenue growth, it must ensure that the value captured by its tenants remains within its ecosystem, rather than leaking back to Ethereum. This marks a critical juncture for the AEP model, where theoretical revenue potential must be balanced against the practical realities of chain migration and currency competition.