I'm going to argue that you create the type of forum you wish to take part in. If you want a lower activity forum but one with exceptionally thoughtful posts, then don't post unless you feel you have something particularly good to bring to the table. If you want a more active forum but one in which you have to wade through more material to find the posts that interest you more then post whenever you feel you have something that is topic appropriate and interests you. As for the uploading and linking I have no idea and would be as interested as you to find out.