In more detail
These sites are based around Affiliate marketing.
Companies pay the site £25 for each person that signs up to their offer being advertised.
If you want an iPod, then you will need to refer 8 people to sign up and complete one of the free offers.
So if an iPod is 8 referrals then that will be 8 x £25 = £200
You also have to complete your own offer which will add another £25 to that making the total money the site gets £225.
This pays for the iPod which retails at about £170 and leaves the site with enough money left over to make a profit.
What are the offers?
You can see the recommended offers over at the side of this page
Some of the UK offers shown below
Not from the UK? Then don't worry there are also international offers too.
Offers
To complete this offer sign up to the 2 week free trial and rent at least 1 DVD.
To complete this offer sign up, deposit at least £10 and place a bid.