People love to have access to things that other people can’t get. It makes them feel special, and it is a marketing tactic that really works. Granting access to secret pages works well on the Internet. It works best when you limit the number of people with access.
For instance, you can grant access to only a lucky few, or you can have a time limit for accessing the pages. You can grant access to secret pages on your website with an autoresponder.