GetRef is a program that you can join in order to get more referrals for a program you’re promoting (out of a list of about 2,200). You can earn credits from visiting websites, joining other members programs and from referrals of your own, or alternatively you can buy them.
I’ve currently got one referral, and over 48 credits, 8 from joining programs and clicking links, and 40 that I purchased for $10. I’ve initially invested 30 of these credits in promoting Yuwie and Bux3. Now to see how it goes.