I would assume you have registered and can login. For some of the lesser threads/forums, this should be enough to see the content posted.
For others, you usually need to reply. I doesn't matter what the reply is, anything, even gibberish will suffice. Return back to 1st page when finished and the links your looking for may appear.
Still others want thanks before you can see links. The heart icon below a post is the chinese (taiwanese) symbol for thanks. Refresh page after to show content.
My experience with all of this comes from www.youiv.com