Hey Rob and Bandit
I think that Buffalo Rising Megaways Build a Bonus is the most expensive bonus going (20 spins, 10x multiplier, 117649 Megaways per spin) at 7,500x for the bonus!
Madness. I played it a lot on demo mode and never got past 3,500x
However with a top with of 250,000x I don’t think there’s a bigger jackpot available