Looks like another of the typical variety of pyramid scemes going around.
Get a free DVD player. Get a free iPod. Get a free laptop. blah blah blah.
Notice that the page says, “If you COMPLETE AN OFFER” and your 5 friends do too. The “Offers” are usually things like signing up for credit cards, or signing up for purchasing clubs (book clubs, CD clubs, etc. etc.), or buying things.
I would guess that the larger the value of the “free gift”, the more “offers” have to be completed (by you and/or your friends).