Your Claimant Volume Used to Be Your Weapon. Defendants Just Turned It Into a Fixed Cost.

The old mass arbitration playbook had a beautiful core mechanic: file enough individual demands, trigger enough individual filing fees on the defense side, and the economics of fighting each one become so painful that settlement is the only rational move.

That mechanic is breaking.

Not because courts are blocking mass arb. Not because claimants stopped signing up. Because defendants rewrote their arbitration clauses to absorb volume without bleeding. And the firms that are still spending $1,000 to $2,000 per signed claimant without modeling what happens after the signature are building portfolios into a framework specifically designed to make their biggest asset, the size of their docket, irrelevant.

The Clause That Changed the Equation

Raging Waters published updated Terms of Use this month with a mass arbitration clause that should be required reading for any plaintiff firm running claimant acquisition campaigns. The relevant mechanics: when 25 or more similar individual demands are filed by the same or coordinated counsel within 30 days, the entire matter triggers JAMS Mass Arbitration Procedures. Claims are then batched in groups of 100. Each batch gets one arbitrator, one consolidated proceeding, one set of filing and administrative fees per side.

Read that last part again. One set of fees per side, per batch of 100.

Under the old framework, filing 500 individual arbitrations meant the defendant faced 500 individual filing fees. Under this clause, filing 500 demands means five batches, five sets of fees. The per-claimant fee pressure on the defense side just dropped by roughly 95%.

Raging Waters is not alone. Cash App routes to NAM with a 12-bellwether cap. Three Wishes Cereal uses AAA with 10 bellwethers and a stay on all remaining claims. Baume and Mercier goes further: if post-bellwether mediation fails, claimants lose the right to arbitrate entirely and get pushed into New York state court. These are not outliers. This is the new default.

Why Your CPA Model Is Now Missing a Variable

Most plaintiff firms model claimant acquisition cost as: total marketing and intake spend divided by signed retainers. The good ones adjust for post-signing attrition (the 15 to 30 percent of signed claimants who never become filed claimants). The best ones model cost per filed claimant.

Almost nobody models cost per claimant that actually generates settlement pressure.

Under a batch arbitration clause, your first 100 filed claimants generate exactly as much fee pressure as your 100th claimant alone would have under the old rules. Claimants 101 through 200 generate one additional unit of pressure. You spent $100,000 to $300,000 acquiring those 200 signed claimants, and the marginal pressure from the second hundred is the same as the first.

This does not mean volume is worthless. A larger docket still gives you more bellwether candidates, more data points for settlement valuation, and more total recovery if you win. But the relationship between volume and settlement leverage has changed from linear to stepped. Every 100 claimants is one step. Spending $150,000 to move from 250 claimants to 350 claimants gets you one additional step, not 100 units of individual pressure.

The Acquisition Decisions This Forces

If you accept that claimant volume now generates leverage in 100-unit steps (or 12-bellwether caps, or 10-case stays, depending on the clause), three things follow for how you spend acquisition dollars.

First, read the clause before you buy a single lead. This sounds obvious. It is not happening. Firms are still greenlighting $80,000 to $200,000 in acquisition spend based on the target company's product, the claim type, and the estimated settlement range, without pulling the current arbitration agreement and modeling the procedural framework they are buying into. Every clause is different now. Some batch at 100. Some cap bellwethers at 12. Some impose global mediation with a court-fallback kill switch. The acquisition budget should be a function of the clause, not the other way around.

Second, optimize for claimant quality over claimant quantity. In a bellwether world, your best 6 to 12 claimants are worth more than the next 500. The bellwether cases are the ones that establish the settlement value for the entire docket. If your intake process is optimized for speed and volume but not for identifying your strongest individual fact patterns, you are spending acquisition dollars on a denominator that does not move the numerator. Intake screening, documentation depth, and claimant qualification criteria all matter more in a batched framework than they did when every individual filing was its own pressure point.

Third, model your acquisition spend in tranches, not as a single campaign. If the clause batches in groups of 100 and stays all remaining claims during bellwether proceedings, your first tranche of acquisition spend should target enough claimants to fill your bellwether pool with strong candidates and clear the first batch threshold. The second tranche should be contingent on bellwether outcomes. Spending your entire acquisition budget before the first bellwether hearing is a bet that volume alone will force settlement. That bet paid off in 2022. It is not paying off in 2026.

The Completion Side Gets Harder Too

Batch clauses do not just change acquisition math. They change completion math. When claims are stayed pending bellwether proceedings, you are asking claimants to remain engaged and responsive across a timeline that could stretch 12 to 18 months before their individual claim moves. The longer the stay, the higher the attrition. The higher the attrition, the more you need to spend on re-engagement to hit your release threshold when settlement finally comes.

This is where the admin you choose becomes a line item that either saves or sinks the matter. A claims administrator that sends a notice, waits, and sends a reminder is not built for a world where claimants sit in a stayed queue for a year. You need a completion stack that treats engagement as a persistent campaign: native document signing so claimants can execute from their phone in 90 seconds, SMS and email sequences that keep them warm across months, and an AI layer that can field their questions at 2 a.m. without burning associate hours.

I run a tech stack, so I am biased. But the math is the math. On a 5,000-claimant matter with a 90% release threshold, every point of attrition during a bellwether stay is 50 claimants you either re-engage or replace. At $1,500 CPA, replacing those 50 claimants costs $75,000. Re-engaging them through a persistent outreach campaign costs a fraction of that, but only if your admin infrastructure is built for persistence, not for one-and-done notice.

The Firms That Win in 2026

The firms printing money in mass arbitration right now are not the ones with the biggest dockets. They are the ones who read the clause first, model the batch economics second, set acquisition budgets third, and choose completion infrastructure fourth. That sequence matters. Every step depends on the one before it.

Volume was the weapon. Now it is a variable. The weapon is precision: the right claimants, the right bellwether candidates, the right engagement stack, deployed against a clause you actually understand before you spend dollar one.

The firms that figured this out six months ago are already modeling their next campaign differently. The firms that figure it out six months from now will have spent a lot of money learning the hard way.