Work the royalty backwards to size the tenant. Ten cents on the dollar producing $360,000 implies about $3.6 million of net protocol revenue at Robinhood Chain in July [5][4][1], which is to say the chain's entire first full month was worth roughly what it then took in fees in the single day of September 1 [1]. Ten percent of that day, if fees and net revenue were the same thing, is $375,000, more than the whole July cheque [2]. They are not the same thing, since net protocol revenue is what survives paying for settlement and data, and the source does not give that spread [4]. The order of magnitude survives anyway.
The more interesting version of the arithmetic runs the other way, through the DAO. If $360,000 was 35% of Arbitrum DAO income for July, the month totalled about $1.03 million [3], and the first half's $6.19 million across four revenue lines averages $1.03 million a month [7][4]. So July, with a new franchise tenant supplying a third of the take, came in at about the six-month average, which leaves the older lines at roughly $670,000 against their own $1.03 million run rate [5]. That reading assumes the first half was evenly spread, which it very likely was not, and Brendan Ma of the Arbitrum Foundation says that on July's figures third-quarter income is already tracking to beat the second quarter by more than 40% [9]. Both can hold: a rising total, and a base being replaced rather than added to.
The tenant's own ratios deserve a look. Decentralized exchange volume of $1.5 billion against $750 million locked turns the deposit base over twice in a day [2][3][6], and $3.75 million of fees is half a percent of that locked value paid inside twenty-four hours [7]. Those are trading-venue ratios, not balance-sheet ratios, and trading volume is the line that leaves.
The view, and it may be wrong: what Arbitrum is selling is a licence at gross margins above 97% [8], better per unit of effort than operating a chain, and $360,000 a month annualises to $4.32 million against a first half in which all four lines together made $6.19 million [8]. The counter-thesis sits inside the same contract. The 10% applies only to chains settling outside Arbitrum One and Nova [4], so a franchisee that brings settlement back in stops paying, and one customer at 35% of income [5] is concentration the DAO does not control, given that Robinhood was issuing tokenized stocks on Arbitrum One before it spun up a chain of its own [11] and could presumably move again. With $125 million of non-ARB assets at the end of June [10], the allocation question is whether that money buys traffic for Arbitrum's own sequencer or buys the next franchisee, and the margin arithmetic answers it.
