> Remember that if you're not in an advertiser's target demographic online, you won't see their ads.
That's one statement I can not believe. But it might be the case that I have not indeed seen the ads from those companies, maybe because of where I am.
I've seen plenty of McDonald's ads online. Coca-Cola, usually around Christmas and the Super Bowl. P&G? Occasionally, but probably more often than I realize because it has so many brands.