Content Gateway Script

We need a content gateway like this : [login to view URL] 1) The page is locked, the user must complete a survey to unlock the page. 2) We want to run our own surveys in the content gateway. 3) (If possible we would like to show an ads in function of the user's country). Example : The user needs to sign up to Freelancer.com, then confirms the e-mail, and after he is registered, the page unlock itself. Kind regards, DailyTime LTD