Duel.com Glossary: Crypto Casino Terms Explained

Three vocabularies collide on a crypto casino: gambling, cryptocurrency and platform-specific jargon. This glossary covers all three, grouped by where you will meet them.

Gambling and odds#

House edge — The percentage of every wager the operator keeps on average over the long run. A 2% house edge means an expected loss of 2 per 100 wagered, repeated over a very large number of bets. See house edge and RTP.

RTP (return to player) — The mirror image of house edge, expressed as what the game pays back. 98% RTP equals a 2% house edge.

Volatility (variance) — How widely results swing around the average. High-volatility games pay rarely but larger; low-volatility games pay often but smaller. Volatility does not change RTP, only the ride.

Expected value (EV) — The average outcome of a bet if it were repeated indefinitely. In casino games EV is normally negative for the player by design; Duel Originals inside the daily zero-edge allowance are the exception, at exactly zero.

Bankroll — The total amount you have set aside for gambling, as distinct from the balance in any single session.

Vig / juice / margin — The sportsbook equivalent of house edge, built into the odds. Two evenly matched outcomes priced at 1.91 each rather than 2.00 is vig in action. See how to read odds.

Implied probability — The chance of an outcome implied by its odds. Decimal odds of 2.50 imply 40%. Adding up implied probabilities across a market yields more than 100%, and the excess is the margin.

Parlay / accumulator — A single bet combining several selections, all of which must win. The margin compounds with each leg. See parlays explained.

Push / void — A bet returned as a stake refund because the event tied, was cancelled or failed to meet settlement conditions.

Crypto and networks#

Network / chain — The specific blockchain a transfer travels on. The same coin can exist on several networks and they are not interchangeable. See choosing the right network.

Confirmation — A block added to the chain that includes your transaction. Platforms require a set number before crediting a deposit. See blockchain confirmations explained.

Gas fee / network fee — The cost of having the network process your transaction. Paid to the network, not to the casino. See gas fees and network costs.

Transaction hash (TXID) — The unique identifier of a transaction. This is the reference support will ask for when a deposit is missing.

Block explorer — A public website for looking up any transaction or address on a chain. See how to check a transaction.

Memo / destination tag — An extra identifier some networks require to route funds to the correct account. Omitting one when required usually means manual recovery.

Stablecoin — A token designed to hold a steady value against a currency such as the US dollar. See stablecoins explained.

Custodial vs non-custodial — Whether someone else holds your private keys. A casino balance is custodial: you hold a claim, not the coins.

Mempool — The waiting area for broadcast-but-unconfirmed transactions. A busy mempool means slower confirmations and higher fees.

Platform and rewards#

Several of these terms describe bonus mechanics you will meet at other casinos. Where Duel.com works differently, the entry says so.

Rakeback — A share of the house edge returned to you on each bet regardless of outcome. On Duel.com: 50% of the house edge on third-party slots, credited instantly with no wagering requirement and no expiry. See rakeback explained.

Zero Edge / zero-edge allowance — Duel.com's model for its in-house Originals. They carry a 0.1% base house edge that is refunded as instant rakeback, giving a net 0% edge (100% RTP) inside a daily allowance of $50,000 wagered per player, with a $1,000 per-bet cap, resetting at 00:00 UTC. After the allowance the games run at 99.9% RTP until the reset.

Wagering requirement — The multiple of a bonus you must wager before it can be withdrawn. Duel.com has no deposit-match bonus and its rakeback has no wagering requirement; a 1× playthrough of deposits before withdrawal is commonly reported. See wagering requirements explained.

Game weighting — How much each game type counts toward a wagering requirement at a bonus casino. Slots often count 100%, table games far less, sports sometimes not at all. Not part of Duel.com's standard rewards.

Max bet rule — A cap on individual bet size while bonus funds are active at a bonus casino. Breaching it commonly voids the bonus outright, even accidentally. Duel.com's rakeback has no such rule.

Level / tier — Progress markers driven by total amount wagered, unlocking rewards as they rise. Duel.com has no levels or VIP tiers; its rewards are the same from the first bet. See VIP levels explained.

Race / leaderboard — A time-limited competition ranking players by wagering volume or multiplier achieved. See races and leaderboards.

KYC (know your customer) — Identity verification. Duel.com has no routine KYC and no fixed verification levels; its terms allow a discretionary check, run through Checkin.com, when an account is flagged, most often before a withdrawal. See verification guide.

Source of funds (SOF) — A follow-up check asking where money originated. Usually triggered by larger amounts. See source of funds requests.

Self-exclusion — A binding request to block your own access for a defined period. See self-exclusion guide.

Provably fair#

Server seed — A random value the operator generates and commits to by publishing its hash before you bet.

Client seed — A value from your side, editable by you, that mixes into the result so the operator cannot control the outcome alone.

Nonce — A counter incrementing with each bet on the current seed pair, making every result unique and reproducible.

Hash — A one-way fingerprint of data. Publishing a hash proves a value existed beforehand without revealing it.

Seed rotation — Replacing the current seed pair, which reveals the old server seed so past results can be verified. See how to rotate your seed.

Summary#

Casino vocabulary describes the odds, crypto vocabulary describes how money moves, and platform vocabulary describes the rewards layer on top. House edge and RTP are the same number viewed from either side; confirmations and network fees govern deposits and withdrawals; wagering requirements and game weighting decide whether a bonus is worth accepting at casinos that offer one. On Duel.com the rewards layer is rakeback and zero-edge Originals, with no deposit bonus and no wagering requirement on rakeback.