My users found a bug quite quickly! You can transfer money to yourself, effectively doubling it each time! So, I gave the ones who were doing it a negative number with a few zeros.

if ($nick = $2) {
notice $nick >=( Removing some credits.
set %cheatmoney $calc($readini(scripts\Money\mnycount.ini,$nick,money) - ($0 * 20))
writeini -n scripts\Money\mnycount.ini $nick money $($+(%cheatmoney),2)
HALT
}