A referral program is one of the fastest growing internet business there is available because it is free. People may wonder how they get paid in doing this. The most common and convenient way is through Paypal. It is like a bank that exists online. You can use it to receive payments and pay for online purchases. There are also companies that pay through checks which are being mailed to you.
Regardless of their payment scheme it is nice to know that there are programs that enable you to make money without having to spend for it. All you have to do is perform on it.