depends on what kind of money you're talking about.. to make extra income you can do several churn and burn methods.. however, to have longevity you need a distinct plan.. something that can sustain itself.. CPA is harder because you have to constantly test campaigns etc.. because after awhile campaigns burn out.. so you have to have marketing skill.. however, if you work hard and build fan pages.. and keep the audience engaged.. and then use the traffic from one page to build more.. it can be a profitable business.. the thing with this is patience.. if you are in it to profit immediately then try blackhat stuff.. but if you're serious and want to make a sustainable income.. then it takes planning, time, money and patience.. alot of the big fanpages from back in the day benefited from lack of security and most of those pages come from spamming.. the pages got so big that they were able to go white hat.. now its harder to build fanpages because of saturation (everyone trying to do it).. so you have to have some diligence to do this.. its not an over night thing.. good luck