Quoting just for references in case few hours later someone find a rounding issue again
Nice idea! Because I did!
Set bet amount to 0.00000001 (one satoshi) and payout multiplier to 1.5
You can't divide a satoshi so 1.5 gets rounded to 2.
The house edge is 32.24%. (Roll over 33.86, or Roll under 66.13 with 2x payout)
To crypto-games.net admins: Will I get a price for this?

If i play for 1 satoshi and win, i get one, not two.