The Feature Bet Mode is an optional setting that allows players to increase their chances of triggering the Wheels of Flame bonus. When activated, the Feature Bet Mode doubles the chance of landing Flame symbols on the reels, making it more likely for players to enter the bonus round. However, this mode comes at an additional cost, doubling the player's base bet. The Feature Bet Mode is an exciting option for players who are willing to trade a higher stake for an increased likelihood of triggering the game's main bonus feature.