Like the way these guys pose themselves, 5% return in one month equates to 60% in one year my bad its 20% a day, heck these guys creating money out of thin air? Why they have not destabilized the economy yet? Just asking yourself these questions yields the answer that it is too good to be true, but if you are swayed by their words and think you are going to make money, you are only making a fool of yourself.
Dont even try to experiment with 10 to 20$ - its not worth it, rather buy a lunch bento with that instead.
Their business model is based on creating thousands of accounts at a low cost and promoting them in the hope that someone will deposit 10 to 20 dollars to try the service. Such scammers will continue to create more of these services if they are able to collect 100 dollars per month (fooling 5 users).
If they find a suitable person, they may risk doubling his profits quickly so he can deposit more, and so on until they steal him.