Crypto casinos sell in-house Originals as 100% RTP because the badge is short. The badge is also incomplete. On the Duel rail the tile still says 100%. Where the paytable can be read, the second number is already public.
| Original | What the lobby prints | What a second reading shows | Format |
|---|---|---|---|
| Plinko | 100% / Zero Edge | 98.906% to 99.487% across 27 risk and row tables | 8 to 16 rows, three risks |
| Mines | 100% / Zero Edge | 99.9%, 0.1% edge, pinned by a 2,040,932.03x full clear at 9 mines | 5×5, 1–24 mines |
| Castle Roulette | 100% | Layout prices every tier at 100%. Config allows 0.1% to 5% | 48 segments, six tiers |
| Crash | 100% tile, Zero Edge on the client | Body silent. Independent write-ups: within caps, or reported 99.9% after a cap | Rising curve, default cashout 2x |
| Dice, Beef, Keno, Limbo, others | 100% | Not independently priced on that site | House Originals |
Plinko is the cleanest audit: every bucket copied off the live board, binomial return, no simulation. High risk at 12 rows is the cheapest of the 27 at 99.487%. Medium at 8 rows is the most expensive at 98.906%. That is a 2.13 times difference in house edge under one name. Mines needs no sample. The record win is 0.999 of C(25,9). Castle Roulette’s wheel is fair on the segments we counted and still carries a config band. Crash is the one that should not be averaged with Aviator’s official 97%.
Twelve tiles now sit on that rail, Limbo included. Duel Online Casino is the page set that keeps the billed figure and the measured figure in the same paragraph. If a 2026 Originals round-up only repeats 100%, it is quoting the badge.
