I believe that the concept of letting other expert traders do the trading for you is quite a good one but we have to make sure that these people are real, into real trading and competent enough with what they are doing. The big reason why many are wary of such a scheme is because all of the programs along this line in the past are now gone dead. So how can we make sure that this is not just another ponzi scheme (paying old members from money of new members) masquerading as trading just to attract more investors? In the past there had been good program with good traders at the helm but one day they encountered many losses...they eventually closed shop.
You never can be 100% sure that there is no ponzi scheme. However in one of the groups cloudshare you can replicate their trades with their app.