In fact, they have been around since Charles Fey invented them in San Franciso back in 1887.
They slowly began to spread across the west and could be found in various saloons and back rooms across the area.
They eventually made their way to the East coast, where they were prominently featured in casinos and other establishments.
They eventually became popular because they required little effort or skill, and would sometomes give the player a big payout from a small bet.
Eventually, everyone from grandmas to young adventurous patrons flocked to the slot machines to try their hand at the new three reel bandits.
Anyone could play them and they still offered a level of excitement and the possiblily of profitability that made people want to return to bet more.
Soon enough, enterprising business-minded individuals realized the opportunity these machines posed as they give back to the casino more than any other type of game and began making them as easily accessible as possible.
Although slot machines pretty much sold themselves because players like them and the odds are the best for the casino, they were modified from their humble original look to be much more interactive, colorful, and of course, exciting.
The goal was to make them irresistible to people who passed by them so they would spend money, while being entertaining enough to warrent returning to try luck over and over again (spend more money). Having more than one payline, or line where the symbols match became more appealing.
Then came Multiple paylines and jackpots Colorful icons such as fruit symbols were added to make the slot reels more complex and interesting. As three reel slots grew to 3 paylines, eventually everything else grew in size. Being able to bet using more than one payline was the precursor to the max bet.
Max bet refers to the maximum currency bet fed to the slot machine while playing maximum paylines for that spin.
Playing max bet, or the highest allowable bet gives the player a chance to win the largest mulitpmier to thier bet and/or jackpot.