The single zero variant of roulette was created primarily to enhance the game's appeal and profitability for casinos while offering players better odds compared to the double zero version. By eliminating the extra zero, the single zero variant reduces the house edge, making it more attractive to gamblers who seek better chances of winning. This version also helps differentiate the game in various markets, promoting it as a more favorable option. As a result, the single zero variant has become popular in many European casinos and is often seen as a more sophisticated choice for players.