Did You Know? Fascinating Facts About Online Casinos
Last updated: 13 August 2026
Welcome to our Casino Beacon 'Did You Know?' collection! Discover surprising facts about online casinos, slot games, bonuses, casino technology, and gambling history. From record-breaking jackpots and unusual game origins to bonus rules and modern casino features, there's plenty here that even experienced players may not know. Follow the links throughout the page if a fact catches your interest and you want to dig deeper.
On this page:
Slots & Jackpots
Did You Know?
Some progressive jackpot winners never play the maximum stake. Many modern progressive jackpots can be triggered from any qualifying spin, meaning even very small bets can sometimes unlock life-changing prizes. Discover more in our guide to progressive jackpot slots.
The vast majority of slot players focus on RTP percentages, but volatility is often just as important. Two slots with identical RTPs can produce completely different playing experiences depending on how frequently they pay and how large those payouts tend to be. Learn more in our guide to slot volatility.
The largest online slot jackpot ever recorded was over €19 million on Microgaming's Mega Moolah progressive jackpot slot - and it was won from a stake of just 25p (€0.25). The record still hasn't been beaten, either for a larger online slot jackpot or a lower stake producing a bigger win. Learn more about huge progressive prizes in our progressive jackpot slots guide.
The Liberty Bell, created by Charles Fey in the late 1890s, is widely credited as the first true slot machine and helped shape the basic design that later evolved into modern slots.
Many slot games now include a Bonus Buy feature that lets players pay extra to jump straight into a bonus round. These provide instant access to the feature, but can raise the cost of a single round dramatically - learn more in our Bonus Buy Slots guide.
Casino Games & Odds
Did You Know?
Licensed online casino games don't wait for players to press spin before creating random results. Their random number generators (RNGs) produce thousands of numbers every second, continuously and independently. The instant you press spin, the game simply captures the current number and uses it to determine the outcome. Learn more in our guide to what makes a casino game fair.
The highest RTP casino games can return more than 99% over the long run when played with perfect strategy. Certain versions of blackjack and video poker come remarkably close to breaking even, which is why skilled players often favour them over games with a larger house edge. Learn more in our guides to RTP and house edge and video poker strategy.
Blackjack got its modern name from a special early casino promotion in the United States. Some gambling houses paid a bonus if a player hit the ace of spades together with a black jack (either the jack of clubs or jack of spades). Read more about the History Of Blackjack.
Online slots generally have better RTPs than slots at land-based casinos. Many popular online slots return 96-98% over the long run, while machines in brick-and-mortar casinos commonly have lower payout percentages. RTP describes the theoretical long-term return rather than what you should expect from an individual session. See our Highest RTP Slots 2026 guide for examples of games with particularly high published returns.
Bonuses & Withdrawals
Did You Know?
Winning $1,000 from a no deposit bonus doesn't necessarily mean you can withdraw $1,000. Many offers have a max cashout that limits how much bonus-derived winnings can actually be withdrawn, regardless of your final balance. Learn how these limits work in our Max Cashout Rules Explained guide.
Not all casino games contribute equally to wagering requirements. Slots commonly contribute 100%, while table games and some other categories may contribute much less - or nothing at all. Always check the individual bonus terms before playing. Learn more in our How to Clear Bonus Wagering guide.
Free spin bonuses are usually locked to specific games - always check which slots qualify before you play! This is particularly the case with Free Spin Slot Spins where only permitted slots can be played. If you prefer to spread your no deposit bonus over various slots, you will be better suited with a cash bonus that allows play on multiple games.
Wagering requirements are not the only bonus rule that matters. Terms like maximum bet, game restrictions, and bonus expiry dates can make a huge difference to whether a bonus is really worth claiming. See our Understanding Wagering Requirements guide.
Most online casinos impose withdrawal limits per transaction, week or month - but there are exceptions. Some casinos, including SunnySpins, advertise no overall maximum cashout, allowing large balances to be withdrawn without an ultimate winnings cap. See more examples in our No Max Cashout Casinos guide.
Casino History
Did You Know?
The word casino originally meant a small house or villa in Italian - not a gambling hall. Over time, the term became associated with places for social gatherings, music, dancing, and eventually gaming.
Everygame, which bills itself as the world's first online casino, launched as Intertops in 1996. Remarkably, the casino is still operating today, making it one of the longest-running names in online gambling.
The origins of roulette stretch back to the 17th century, when Blaise Pascal experimented with a perpetual motion device. By the 1790s, Paris gambling houses were using the combined spinning wheel and betting-table format recognisable as roulette today, with the game later crossing the Atlantic to American gambling halls. Read more about its development in our History of Roulette guide.
Video poker emerged around 1970, but the game nearly fizzled out before International Game Technology (IGT) helped popularise it. Today, numerous versions are available online, combining elements of slots and draw poker with strategy-based decisions. Read more in our History of Video Poker guide.
Online Casino Technology
Did You Know?
Mobile devices have transformed online casino design. Modern slots and casino games are increasingly built with smartphones and touch screens in mind, rather than simply shrinking a desktop game to fit a smaller display. Learn more in our Mobile No Deposit Casino guide.
Cryptocurrency has become a mainstream payment option at many online casinos, with Bitcoin, Litecoin, Ethereum, Dogecoin and other coins available for deposits and, at supported sites, withdrawals. Crypto transactions can also be considerably faster than some traditional casino payment methods. Learn more in our Crypto Casinos Explained guide.
Responsible gambling tools such as deposit limits, time-outs and self-exclusion are available at reputable online casinos. Deposit limits can be particularly useful because they let you set a spending boundary before you start playing, rather than relying on an in-the-moment decision. See our Responsible Gambling & Addiction Advice page for more information.
Many online casinos let you play with your own country's currency if it's not US$ - such as South African Rand, New Zealand Dollars, Canadian Dollars, and British Pounds - this can help avoid currency conversion when depositing, playing and withdrawing.
Live dealer casino games use HD video to stream real human dealers directly to your device - often with native-speaking dealers for global players. If you're new to live dealer casinos and want to grasp the basics, see our Best Live Dealer Casino Sites guide for 2026.
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