Spinfinite, Slotomo, Neon Rush: 8 Mamba Limited Casinos

Eight sweepstakes casinos that market themselves as separate brands run on one rulebook. Spinfinite, Spinsly, Zonko, Deal or No Deal Win, Slotomo, Neon Rush, Amazon Jackpots and Spinszy each serve a Terms of Use stamped "Last updated: 2 June 2026", each says it is "owned and operated by Mamba Limited, incorporated in Isle of Man", and the clause that blocks 14 US states is byte-identical across all eight.

We reported three of these brands as one operator a week ago. The five others are new: Spinfinite, Slotomo, Neon Rush, Amazon Jackpots and Spinszy appear nowhere in our brand database or in anything we have published, and Spinfinite now turns up in Bing autocomplete against a no-deposit query, which is our own signal that people are looking it up. So it is worth saying plainly what a player gets when they open a second account in this family: the same document, the same operator, the same free-entry PO box in New Hampshire.

Which sweepstakes casinos does Mamba Limited run?

These eight, and the terms page each one serves. We fetched every one of those documents on August 23, 2026 and extracted them to plain text. All eight terms pages run to roughly 70,500 characters and differ only in brand name, support address and footer.

Those registration dates come from WHOIS and they are not launch dates. Four of the eight domains predate the sweepstakes industry's current shape by years, which is what buying an aged domain looks like, so do not read the 2001 date next to Zonko as a 25-year-old casino.

None of the eight is in our ranked list of sweepstakes casinos. Three of them, Spinsly, Zonko and Deal or No Deal Win, appear in our August 16 report on the clause that voids unredeemed Sweeps Coins when a state bans sweeps, which read Spinsly's rules in full and could not open the other two. That piece is where the detail of the redemption terms sits; what is new here is how many brands they govern.

Which 14 states do all eight sites block?

Clause 3.4 of every one of the eight documents reads, with no variation at all: "You do not reside in and will not access the Games or Service from the states of Washington, Idaho, Louisiana, Michigan, Nevada, Montana, Delaware, Connecticut, New Jersey, New York, California, Tennessee, Indiana, Maine (USA) or any jurisdiction outside the United States (the 'Restricted Territories')."

We hashed that sentence on each site. All eight produce the same hash, which is a stronger check than reading eight lists and believing they match.

Oklahoma is not on it. Oklahoma's ban takes effect on November 1, 2026, and none of the eight documents has been revised to reflect it: every one still carries the same June 2 stamp, which is what a group that edits one rulebook and pushes it to every brand looks like. When Oklahoma does get added, expect it on all eight the same day. That lag is not unique to this family, either: on August 12 we found every tracked rulebook still accepting Oklahoma with the ban ten weeks out.

What else is identical across the eight?

The two Sweepstakes Rules documents we could read, Spinsly's and Amazon Jackpots', match on more than nine sentences in ten, and the differences we found were brand names. Both name Mamba Limited as the sweepstakes sponsor at rule 1.1. Both give the same postal free-entry address: "PO Box 8217 Manchester NH 03108", with only the "C/O" line changing. Two separately branded casinos sending their free entries to one PO box is the plainest evidence in this piece that they are one operation.

What are the cash-out limits, and when do the coins expire?

These are the terms that decide whether a balance turns into cash. We published these figures on August 16 as Spinsly's alone, because Spinsly's was the only rulebook we had read. Amazon Jackpots' rulebook is the second one we have been able to open, and it carries the same numbers, so the table below is now the family's position rather than one brand's:

That last row is the one to sit with, and it is the finding we led on a week ago. If your state acts against sweepstakes while you are holding coins, the operator's own document says the coins go and nothing replaces them, including entries you obtained free by post. What the second rulebook adds is reach: this is not a quirk of one small brand's paperwork but the standing term at eight sites. Our guide to how to redeem Sweeps Coins covers what each step needs, and the Gold Coins and Sweeps Coins split explains why only one of the two currencies is ever at stake.

The drafting contradiction we flagged in Spinsly's rules is carried word for word into Amazon Jackpots' copy too. Rule 7.1 caps redemptions for residents of "New York or Florida" at $5,000 per play round, while clause 3.4 of the terms bars New York outright. Florida is not on the restricted list, so its cap is just a cap; New York's is a limit on players the same document says should not be there at all.

Why could you only read two of the eight rulebooks?

Because we are not fetching from a US address, and this platform geo-blocks by path. All eight sites link /help/play-rules/ in their footer. On Spinsly and Amazon Jackpots it served us the full document, about 25,000 characters of text. On the other six it returned the same "Sorry, Your Location Has Been Blocked" shell the lobby returns, between 1,173 and 1,531 characters of it, while the Terms of Use on those same six served in full.

So this is a limit on our vantage point, not a finding that six brands hide their rules. A US player can very likely open all eight. What we can say is that the two we read are the same document, and that the terms page, which we read on all eight, incorporates the rules by reference on every one of them.

What should a player actually do with this?

Treat the eight as one counterparty. Opening an account at Slotomo because Zonko went quiet is not moving your money somewhere else, it is moving it between two front ends of the same company with the same discretion clauses behind both. A player who spread a balance across Zonko, Slotomo and Neon Rush to avoid concentrating risk did not spread anything.

Two practical rules follow. Do not let a balance sit idle, because the 60-day clock runs on Sweeps Coin play and not on logins. And check the state list before you buy anything: 14 states are barred by the terms, California, Michigan and New Jersey among them, and our state-by-state sweepstakes legality tracker and our guide to whether sweepstakes casinos are legal show which of those bans are statutory and which are the operator's own caution. Several are the latter: the brands we do test block 13 states that carry no sweepstakes ban at all. If you want brands with a longer public record, the newest sweepstakes casinos we do track is the better place to start.

Sources & documents

• Terms of Use pages for all eight brands, fetched and extracted on August 23, 2026: Spinfinite, Spinsly, Zonko, Deal or No Deal Win, Slotomo, Neon Rush, Amazon Jackpots and Spinszy. The "Last updated: 2 June 2026" stamp, the operator sentence and clause 3.4 quoted above come from these eight documents
• Spinsly Official Sweepstakes Rules and Amazon Jackpots Official Sweepstakes Rules - the only two of the eight that served us the rules document. Sections 2.7, 2.8, 4 and 7 are the source of the expiry clock, the forfeiture clause, the state-restriction clause and every redemption figure in the table
• Domain registration dates are from public WHOIS records for the eight domains, queried August 23, 2026. They record when a domain was first created, which is not when a casino launched on it
• Delaware Division of Corporations, list of registered agents - the basis for describing the Wilmington address in five of the eight footers as a commercial registered-agent address rather than an office of the company

The two rulebooks we read are the basis for every redemption figure above; we could not read the other six from this location and have not assumed they match, beyond clause 1.2 of all eight terms pages, which makes the Official Rules an incorporated policy of each site. The Mamba Limited and Forever Winning LLC sentences quoted above sit in the sitewide footer, which is served on the terms page but also on every other page of those sites, not in the body of the Terms of Use. Nothing here alleges wrongdoing by Mamba Limited or any of the eight brands.

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