Robinhood Chain is weighing the introduction of pay-to-prioritize trading on Arbitrum (ARB), after the Ethereum Layer-2 network switched to an auction-based fee model on September 24 that has already begun generating measurable revenue.

2026--09 COINOTAG Update 03:21 UTC: New figures from Arbitrum put hard numbers on what the auction model is already producing: priority fees contributed more than $120,000 to the network's revenue in the first week after the September 24 launch.

What the September 24 Switch Introduced

Arbitrum's auction model, known as Timeboost, was approved by the Arbitrum DAO and went live on September 24. The mechanism allows market participants to bid for access to an express lane that processes their transactions faster than standard submissions, with winning bids directed to the Arbitrum DAO treasury. In doing so, it converts competition for transaction ordering into transparent, on-chain protocol revenue.

Priority-fee auctions of this kind address a well-known dynamic on high-activity blockchain networks, where traders and automated strategies compete for quicker execution. By formalizing that competition, the network captures value that would otherwise flow through informal off-chain arrangements. That matters for a trading platform building its own chain: where participants race for faster fills, an auction lane makes the queue transparent and paid on-chain, rather than leaving speed advantages to informal arrangements.

Robinhood Chain's Arbitrum Connection

Robinhood Chain is the Layer-2 blockchain initiative announced by trading platform Robinhood, built on Arbitrum's Orbit technology stack and designed to support on-chain trading of tokenized assets, including tokenized securities.

The reported deliberation over a comparable pay-to-prioritize mechanism for Robinhood Chain comes as Arbitrum's first-week figures offer an early, quantified reference point for how such an auction system performs on a live network. Signals to watch from here are whether Robinhood Chain's deliberation advances toward a formal decision, and how Timeboost revenue develops beyond its first week — data points that would clarify how auction-based priority behaves on networks oriented toward trading.

This content was first published on COINOTAG.