You have missed to include more information about the broker who sent that offer. Because, only based on their credibility level, you might need to decide whether to invest with them or not. Because in some countries, there are registered brokers who are offering such services in profitable way but they might be taking some big portion of profit as a cut for their services.

So, go for due diligence on that broker and if you are convinced after satisfying all your criteria then you may go for allowing them to trade for you. But, personally I will never prefer or not even consider such options because I do believe into my own skills always.