I've checked this out and I'm currently doing it at the moment and I've checked on the BBC Newsnight website which also supports it and has a 10 minute report on the success of it.
Click on this link and it will direct you how to get a free ipod through my referral.
You need to sign up for a free months membership to this DVD rental website (Screen select or any of the other offers) and then cancel before paying any subscription. I’ve just cancelled and have completed the first half. I just need to refer people who sign up now to claim my ipod. I wouldn’t do this if it was a scam.