You don't get 3% on your balance you have to buy coins to receive 3% on your balance. When you buy the coins you upgrade your account. None upgraded accounts do not get interest. Also when you withdraw you get half of what is there. It makes sense because you give the other half to put back into the program otherwise it wont be sustainable. This website is legit.
Yes but you can so manual mining and earn 3 coins for day for free