You can also choose to reduce the cost of buying the feature, and to do this you will need to adjust the bank wins button that is displayed on the screen. For a quarter of the pie to be a winning possibility it will cost you 25x your stake to gamble, for a half chance of the pie to offer a win it will cost you 50x your stake, and for three quarters of the pie to offer a winning opportunity it will cost you x75 your stake to play. If you wish to take a chance on the pie gamble then you can adjust the size of this and the potential amount it will cost you to trigger the bonus. There are however a couple of extra parts to this that makes it a little more interesting.
Rainbow Riches Megaways™ offers players the chance to buy the bonus, and this will come at the cost of 100x your stake.