What is a referral?
There is an "up line" and a "down line". The down line is the so called "referral", a person who joined with a special link from already existing user. The up line is the person who is already registered at a site and is helping other people to register at the sites with the special link from the up line.
Why do we need referrals?
The PTC and many GPT (Get Paid To) owners invest a lot of money in their sites. They also have to invest in self sponsored ads when they start because there are no advertisers willing to advertise at a site with only 10 members. That's why they offer referral earnings to the people who help other people to register with their special link called "referral link or ref link".
Referral earnings can be everything from 5-100% of what the down line (referrals) earn to 1-10 cent for each new referral that join your down line. Referral earnings help the PTC owners to use less money on advertising (or no at all) in the long run. The higher referral earnings are the more people are willing to invest their own money in advertising the site to get these referral earnings that can be really huge if you got a very big down line (many referrals).
