How can these sites afford to give you these items for just signing up for a free trial?
Basically these sites get paid when you sign up to these free trials, and once you get enough people to sign up they can afford to send you their item.
For example, LoveFilm, a UK DVD by post rental service, pays sites an amount when they get you to sign up for a 14 day no obligations free trial. So the site can afford to send you your item and earn a little commission on top!
Now check out the proof that these sites are legit on the next page...