Let me save you the trouble of being scammed. You will not get a penny from them. What they do is let you think you are making money so that can promote the link. At the end they will ask you to complete an offer in order to cash out. They get paid by you doing survey for them for free, they then submit to 500 company. Any one like this, don't bother to waste your time and your friends time. Try this link
Get Paid For Your Opinion - PaidViewpoint its small but free and legit, Odesk.com, Fiverr.com or Guru.com. You can also try Google AdSense, but you have to pay for this one.