We have users who can't load a huge PDF and want to download it. If you add a resource, the user can't right click and do a download. That's because we interpose a link tracker page.
Fortunately that's no longer needed. Originally it was the only way we could come up with to record the fact that the use had clicked the item. For items that are required that matters. However now, all accesses go through /access/lessonbuilder, so we can record it there.