Making money through CEX referrals is dishonest because it a pyramid scheme that only works if you trick people into losing money. It is also is not viable in the long run because people are going to figure it out eventually (I hope).
Basically, buying GH/s on CEX is not profitable at the current price. Some people might get lucky and make money through trading, but everyone else will lose money. Everyone should know this, but unfortunately they do not. That raises some issues.
First, if the only way to make money at CEX is through referrals, then CEX is nothing more than a pyramid scheme. We all know how pyramid schemes end.
Second, a referral only makes you money if the person spends money on CEX. Buying GH/s on CEX is a money-loser, so a smart person won't spend any money on CEX, and they won't generate any money for you if you refer them. The only way to make money from referrals is to find gullible people to buy GH/ s on CEX.
If that doesn't dissuade you, then maybe this will:
Hopefully that is enough to get you started. I've been doing this for a few days and I have 0.00195632 gh/s in referrals.
The OP is the proud owner of 0.00195632 GH/s. How much money do you think that generates?
$100/month?
$10/month?
$1/month?
Nope, 0.00195632 GH/s generates $0.0006/month. That's less than 1 penny per year!** Assuming the difficulty never changes.
