Submitted by gpersoon, also found by hickuphh3 and shw
The function payout contains an expression with 3 sequential divs. This is generally not recommended because it could lead to rounding errors / loss of precision. Also, a div is usually more expensive than a mul. Also, an intermediate division by 0 (if SherXERC20Storage.sx20().totalSupply == 0) could occur.
Recommend verifying the formula and replace with something like:
Evert0x (Sherlock) confirmed
