Am already in for atleast couple of weeks now, the real is not the amount of income you get, it is you cannot withdraw it from Coinbase because you need to pay the fees which is around $17,
*this is for those who has no balance in coinbase.
So, basically its pointless unless you have 100's of referrals with you, so that you get paid a lot of btc with which you can cover the fees!
not if you convert to litecoin or some other coin right on coinbase and transfer out. Think people, think!