Modo.us Arbitration Bid Denied Over Illusory Terms

A federal judge in Massachusetts refused on September 14, 2026 to send a Modo.us player to arbitration, and the reason goes further than arbitration: District Judge Allison D. Burroughs held that the site's Terms of Use never formed a contract at all. Because Modo's operator reserved the right to revise the Terms "at any time", with changes "enforceable immediately upon posting" and a revised version that "immediately and retroactively supersedes any prior versions", the court found "the Terms impose no binding obligations whatsoever upon Arb" and were "illusory from the outset". Two other federal courts heard essentially the same argument against the same company and rejected it. What separates Massachusetts is not that nobody else tried, but that its contract law answers the question differently.

The case is Miranda v. ARB Gaming, LLC, No. 1:25-cv-13206-ADB, in the District of Massachusetts. We downloaded the 14-page memorandum and order straight from the federal docket and read it in full, then re-downloaded and re-read all four earlier orders and the two magistrate reports underneath them, which is how we check everything we publish. Modo is not one of our ranked brands and never has been: it sits on our sweepstakes casino blacklist over the Arizona Department of Gaming action and the Illinois cease-and-desist wave.

What did the court actually decide?

That ARB Gaming, which does business as Modo.us, cannot enforce its own arbitration clause against this plaintiff, because the agreement containing it was never validly formed.

Katia Miranda opened a Modo.us account on or about October 2, 2023, agreed to the Terms through a clickwrap checkbox, played for roughly three months and last logged in on or about January 17, 2024. ARB moved to compel individual arbitration. Miranda answered that the Terms were illusory and so lacked consideration.

The order turns on a distinction that decides a lot of these motions. A challenge to a contract's validity can be handed to an arbitrator when the contract contains a delegation clause, and Modo's does: any "[d]ispute concerning the enforceability, validity, scope, or severability of this agreement to arbitrate" goes to the arbitrator. A challenge to a contract's formation cannot. Applying First Circuit authority, Burroughs held that an illusoriness argument "raises a challenge to the formation of the agreement", so the court, not an arbitrator, had to decide it.

Then she decided it. The clause the opinion quotes reads, in part: "We reserve the right to revise these Terms at any time. You agree that we have this unilateral right, and that all modifications or changes are in force and enforceable immediately upon posting. An updated or revised version of these Terms immediately and retroactively supersedes any prior versions immediately upon posting, and the prior version is of no continuing legal effect unless the revised version specifically refers to the prior version and keeps the prior version or portions thereof in effect." On that wording, the court found, "every promise ostensibly made by Arb in the Terms, including the reciprocal promise to arbitrate, is subject entirely to the 'condition of whim'". The Terms "fail to meet the basic definition of a contract".

ARB's answer was that in practice it did ask users to re-accept material updates, and on this plaintiff it demonstrably had: the order records that when ARB amended the Terms on December 29, 2023, it required users to re-agree at their next log-in, and that Miranda did so on December 30. The court called that beside the point. ARB "points to nothing in the Terms that obligated it to do so, and its gratuitous decision cannot 'reviv[e] a contract [which] was never formed for its lack of consideration'". The promise has to be written down.

Have other courts rejected the same illusory-terms argument?

This is the part a summary of the Massachusetts order will not tell you, and it changes what the ruling is worth.

Four federal courts had already sent Modo.us players to individual arbitration. We re-read all four orders, and in Ohio and Oregon we read the magistrate documents underneath them, because that is where the reasoning lives. In both, the player raised unilateral modification as a formation problem, and in both the court reached it and rejected it.

In Ohio, the magistrate judge recorded the player's argument as "a lack of mutual assent making the contract illusory" and answered it directly: "Defendant's ability to unilaterally modify the terms of the Terms of Use, including the arbitration clause, does not make the arbitration clause illusory." District Judge John R. Adams adopted that on May 15 after nobody objected to it.

Oregon went further, with a section headed "The Arbitration Agreement is Not Illusory". The magistrate judge applied Oregon law, where "unilateral changes are permissible" if made "in good faith and be based on fair dealing", and then leaned on exactly the fact Burroughs threw out: "Plaintiff was required to accept all material updates to the Terms by clicking a clickbox in order to continue to use the website. She did so; she could have chosen not to continue to use the website if she did not wish to accept." That finding was adopted on July 16.

So the same company, the same clause and the same re-acceptance practice produced opposite answers in three courts inside five months. Oregon treated ARB's habit of collecting fresh consent as curing the problem. Massachusetts treated it as irrelevant, because the First Circuit's test asks whether the operator could retroactively wipe the clause out, not whether it chose to be polite about it.

Only Utah and Illinois are outside that fight. In Utah the plaintiff filed a notice of non-opposition and the motion was granted on the papers. In Illinois, Talisha Harris argued the Terms were "unenforceable and unconscionable because they are supported by unlawful gambling consideration"; Judge Joan B. Gottschall never reached it, holding that Modo's delegation clause sent "contractual challenges" to the arbitrator. We reported that Illinois arbitration order when it landed, and the four-order pattern it belonged to while it was still unbroken.

The Massachusetts order also distinguishes three rulings operators have leaned on, two of them against companies we do cover: VGW, which runs Chumba Casino, and Sweepsteaks Limited, which runs Stake.us. In M.M. v. VGW US, Inc. and Boyle v. Sweepsteaks Ltd., the opinion notes, the plaintiffs argued the contracts were void for illegality, which courts treat as a bar to enforcement rather than to formation: "That conclusion has no bearing on the argument Miranda raises." The third, M.M. v. Sweepsteakes Ltd., was different again, a case where the existence of the agreement was not in dispute at all. Our coverage of the Chumba and LuckyLand arbitration decision described that illegality reasoning when it was handed down.

What happens to the Massachusetts case now?

It stays in federal court, for the moment. The complaint, filed October 30, 2025, brings claims under Massachusetts General Laws chapters 93A and 137 plus unjust enrichment, and proposes a class of "All persons in Massachusetts who purchased Gold Coins on Modo.us". It asks for treble damages under the gambling-loss statute and an injunction shutting the site down. None of that has been decided, and denying a motion to compel arbitration decides nothing about whether Modo broke any law.

One more entry landed the next day. The public docket shows an order filed on September 15, 2026, with no document number, no text and no attached document, and the District of Massachusetts electronic filing feed timestamps it at 14:38:46 GMT. We can report that it exists. We cannot report what it says, and we are not going to guess.

ARB Gaming may appeal the denial, may seek reconsideration, or may litigate. It has not filed anything on the public docket doing so as of our read. ARB has not been asked for comment and had not responded publicly when we published; if it does, this article gets updated.

Does this change anything for players at other sites?

Not automatically, and the Ohio and Oregon rulings are the reason to say so plainly. The same argument has now won once and lost twice against the same document, on three states' contract law. If you are outside the First Circuit, the honest answer is that a court near you may well go the Oregon way.

What the ruling does supply is a test any player can run on a rulebook: does the operator promise anything it is actually obliged to keep? That question has a category-wide answer, because the "change it any time" clause is near-universal boilerplate in sweeps terms. We read the amendment clauses of six ranked brands the same day and set out which sweeps casinos can change their terms without telling you. The related deadline worth acting on, whatever your brand, is the arbitration opt-out: almost every operator in this category gives you thirty days from signup, and the clock starts the day you register, not the day something goes wrong.

If you are choosing where to play rather than where to sue, our ranked list of sweepstakes casinos only carries brands whose paperwork we can actually follow. Modo is not on it. The separate wave of Kentucky class actions includes one against ARB Gaming that has not been decided either way.

Sources & documents

• Memorandum and Order, Miranda v. ARB Gaming, LLC, No. 1:25-cv-13206-ADB (D. Mass.), ECF 38, filed September 14, 2026 - 14 pages, signed by District Judge Allison D. Burroughs, the source of every Massachusetts quotation above
• Class action complaint, Miranda v. ARB Gaming, LLC, ECF 1, filed October 30, 2025 - 27 pages, the Massachusetts class definition, the chapter 93A and chapter 137 claims and the Arizona quotations
• CourtListener docket, Miranda v. ARB Gaming, LLC and its entry list - read September 16, 2026, showing entry 38 and the unnumbered, textless order of September 15, 2026
• District of Massachusetts electronic filing feed - the court's own same-day entry list, timestamping the September 15 order at 14:38:46 GMT
• CourtListener caption search for ARB Gaming - 12 federal dockets, read September 16, 2026
• Findings and recommendation, Anderson v. ARB Gaming, ECF 49 (D. Or., June 24, 2026) - 27 pages, section C, "The Arbitration Agreement is Not Illusory", and the clickbox finding, adopted at ECF 51 on July 16, 2026
• Report and recommendation, Kowalok v. ARB Gaming, ECF 27 (N.D. Ohio, April 24, 2026) - 18 pages, the plaintiff's illusoriness argument and its rejection, adopted at ECF 29 on May 15, 2026
• Memorandum opinion and order, Harris v. ARB Gaming, ECF 36 (N.D. Ill., July 21, 2026) - the delegation-clause ruling, the "unlawful gambling consideration" argument and the August 4, 2025 terms date
• Order granting motion to compel arbitration, Walker v. ARB Gaming, ECF 21 (D. Utah, April 22, 2026) - two pages, granted on the plaintiff's non-opposition

Every order and recommendation above was downloaded and read on September 16, 2026 rather than taken from our own archive. This piece alleges no wrongdoing by any operator: the claims in Miranda are allegations no court has tested, ARB Gaming disputes them, and the ruling reported here decides where a dispute is heard rather than who is right.

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