TOo high or toO low for you?   And you were wrong, it's 14 days(10 trading days), Not 10 days.

At least I'm happy with that!  I invested 100$, and I can get total 111.1$ in return in just 14 days!   
If the site scam on the 15th day, I've earn 11.1$ and lose a shit!

Let's compare with, let's say, 5% daily for 30 days, you invest 100% and get 5$ daily, if the site scam on the 15th day ... you will lose $30!!!