Exactly. For some unknown reason, when a bit of content posted gets a lot of likes, the users start commenting on it. That can really increase the number of people seeing your page, I would suggest trying to find some of these pages that already do this.. They are very successful and easy to follow.
If you have a good amount of fans, you can use your fan page for promotion, or affiliate marketing as well. You can also sell your fan page with natural followers.