Is POS interest compound interest?

If so then assuming you can stake daily, the interest rate is actually more like 171%. Everyone should be staking. I am.

from http://www.thecalculatorsite.com/finance/calculators/compoundinterestcalculator.php

Base amount: $1.00
Interest Rate: 100%
Effective Annual Rate: 171.46%
Calculation period: 1 year