There are some debatable issues as to the future of facebook, we can not knock the great giant, but sooner or later there will be someone bigger and better around the corner, however to answer the question about earning money from facebook , the answer is no, I mean some sites offer affiliate programs where if you place your banner on your site you can earn for the clicks or registrations, they do not have this.
We recently put an affiliate system together for our Travel related site where you can earn money from placing banners on your site, I recommend you to try: http://www.exploroo.com/affiliate
http://www.exploroo.com - Travel Social Networking