just wanna add that some people think they are bucking the system (fb/x/etc) by not clicking on ads. and wanna say that some ads are by exposure, so they only need to be on a page for the advertiser to get his/her ad shown. also they harvest the data, especially fb for demographics etc. so they record every click/like everything matching to what you liked etc.
In short, people arn't bucking the system by not clicking ads.