Crypto casinos love a round number on the Originals rail. 100% RTP. Zero house edge. Provably fair. The badge is easy to screenshot. The payout table is not.
Duel's lobby prints that badge. Several summer 2026 reviews repeat it as 99.9% to 100%, or as a flat 100% on Dice, Mines and Plinko. Combinatorial pricing of the published tables does not agree, and the disagreements are not rounding.
Mines: 0.1% house edge. Return 99.9%, not 100%. Close enough for marketing. Not close enough for a review that claims to have checked.
Plinko: 98.906% to 99.487% depending on risk and rows, across 27 payout tables. That spread is the product. A single 100% is a lie about which board you opened.
Live blackjack, which is not an Original but gets dragged into the same sentence: the client discloses 99.44%. An independent price of the documented eight-deck, 3:2, stand-on-all-17s, no-DAS sheet is 99.3943%. After 60% instant rakeback those become 99.78% and 99.76%. Leave both up. Do not average them into a third 99.
What the hash actually proves
Provably fair settles the Originals, one round at a time: client seed, server-seed hash, nonce, rotate. It does not settle a 6:5 live shoe. It does not settle an account restriction. The operator's answer to players who felt autoplay "looked rigged" is to point at the verifier. The verifier is real for the hashed games. It is the wrong tool for a terms-of-service ban.
Rakeback does not apply to Originals on this brand, which is the correct design. You do not need a 50% cut of an edge that is already 0.1% or a Plinko table you can read. Slots still take the 50% instant cut as cash. Sports tickets take the same engine.
Read the exceptions, not the badge
The Duel Casino Review is one of the few pages that replaces the 100% sticker with measured rows and names Plinko and Mines as the exceptions. Fairness pillar 4.8. Overall 4.4 out of 5, 13 August 2026. That 4.8 is the seeds and the published math. It is not a 4.8 on recourse. Licence and protection on the same page is 3.2.
If a "best crypto casino" list still writes "100% RTP originals" without a table, it copied the lobby. Copy the tables or do not copy the percentage.