Why deal with some potential scam outfit like this when you can deal with a real broker AND pay less commission. Their site says they charge about $5 a side, thats more than real broker charges.
Plus they can take your all money at any time and refuse to give it back. How are you going to get it back? Travel to Uruguay, knock on their door (if you can find it), and ask them to give it back? And good luck getting the Uruguay police to help you get it back, they are probably in business with these guys.