These people will make it as hard as they can for you to take this "free" holiday.
They will give you dates you cant make, from airports you cant get to, to places you dont want to go.
They will take some sort of "admin" fee (say �50) for each person but if you dont take the holiday you never get the money back.
If you turn down the dates or airport they offer you then all of a sudden you stop hearing from them and your "free" holiday disappears.
These people are verging on the criminal and are more hassle than it is worth.