I tried Neobux for a year, and it's impossible to make good money on it. It takes FOREVER to make enough money for referrals, then you have to keep doing it again and again so you can buy more referrals...which make money for you which is just enough for you to renew them. It's an endless cycle no matter what. I wasted an hour each day for this when I could have been doing something productive.
This method seems like it works, but for beginners would take a long time.
I went on the Neobux forums, and some users have their earnings set to public, I've seen people with like 12,000 referrals and there earned balance is about $250,000, that's pretty insane.