On stream yesterday Null was commenting that he didn't really know how Limbo worked and I think I do:
1. you set your multiplier (BMJ usually goes for 2x)
2. you hit the button
3. RNG
4. if the number that comes up is higher than the multiplier, you win, and it gives you back your bet with the multiplier attached. ex. your multiplier is 2x, you bet $50, you win and it gives you $100. Your multiplier is 4x, you win and you get $200. Austin doesn't really fuck with the multiplier, just his bet amount. I'm unsure if the multiplier affects your odds of winning.
5. if the number that comes up is lower than the multiplier, you lose.
I'm like 99% sure that's how it works. Basically it's just an RNG fest where you click the button and it gives you money or it doesn't.