atm staking annual interest rate is 53% (which is basically what you get on JD - turns out the gambling losses don't add up to much i guess)
lending money to shorters on polo has an annual interest rate of 300% (.2999%/day)
compound formula is annualrate=(1+dayrate/100)^365 - 1
Polo take 15% fee + and your clam dont get lent out all the time