onBux.com is a pay to click website. PTC websites post content by advertisers that their users view. onBux users click on the individual ads to get further info from the advertisers, and receive payment of a predetermined amount for each ad they click on.
Like most PTC sites, onBux is free to join. Their general rate of pay is up to $.02 per click, but there are also upgrades, investments, and referrals you can make in order to raise your click rate.
You can acquire referrals directly, where you recruit people to join onBux and list you as their referrer, or you can rent them from onBux for a daily,