Neobux is an oldest PTC(paid to click) site which is great for freelancers. But to be benefited, you need to do some investment.
Let's know how they works
There are some ads by clicking those, you can earn upto $0.01 but ad limitation is only 15-20 so you can't earn so much by clicking ad. You have to invest there and with that you cam buy rented/permanent referral. You will receive some reward if your refferal work regularly and at the end of 30 days, you will have some profit.
I've already cashed out more than $500
I recomment all to use this site if you can invest minimum $20