They are similar to scam, first will do you fine, then soon after, they will start having weird problems here and there. They will then keep whatever amounts/ money that you got there and start telling you that you have violated their terms and condition. Then they will not tell you no matter how you asked of what you did wrong. Once you keep asking them, they will end your conversation so there will be nothing you can do. Better avoid them. The money they trying to steal aren't much from each customers, but it will add up over time. Such clever scam