Maybe if they blocked their ads on the internet, but it just doesn't seem like there is much difference in blocking bing from advertizing on google.com and face

Maybe if they blocked their ads on the internet, but it just doesn't seem like there is much difference in blocking bing from advertizing on google.com and facebook blocking ads for google+. I think Facebook has even more market share in social than google has in search, and both are decisions about advertizing on their own destination pages with their own in-house advertizing systems.