Lots of games, for example Koi Princess and Merlins Millions, have the option of placing a "Bonus Bet" (or "Super Bet") alongside your regular wager. I've been experimenting playing the games with and without the additional bet and so far have come to the conclusion that it's nothing short of a con!
On NetEnt's "Koi Princess" in particular, the game promises to add additional high paying symbols to the reels, and a greater chance of big payouts from the bonus round. It's not guaranteed though and whilst I'm sure I've just been unlucky I haven't seen any benefit when I've reached the bonus wheel with the SuperBet on - just the opposite infact, the prizes have been lower!
So my question is, do you use this option ? And on which games? Do you think it's a fair bet?