Proof!
The following videos were features on many major television networks. They explain how these websites work and how they can actually give away free gifts to you!
Video from BBC Newsnight:
Video from CNN News report:
In fact, there are so many people benefitting from these schemes that whole online communities have been created for users to discuss them. www.exceem.co.uk is an online community of users who use these websites and have recieved THOUSANDS of pounds worth of gifts and cash by using these referral websites.
So why are you still buying things you can get for free?!