The power of Facebook advertising is not on showing ads on their own pages. Very few people look at the ads on FB's pages, and many (most?) people browse FB on mobile devices, where advertising is very hard.
No, the power of FB (and its future, IMHO) lies in FB becoming a data provider. So when you visit a page, the advertisers query FB about this opportunity, and based on the answer, pick an ad or decide how much to bid. And FB then collects 25% of the ad's price as a fee. Given that online advertising is a $30B market, you can imagine FB will have no problems making a lot of revenue.
No, the power of FB (and its future, IMHO) lies in FB becoming a data provider. So when you visit a page, the advertisers query FB about this opportunity, and based on the answer, pick an ad or decide how much to bid. And FB then collects 25% of the ad's price as a fee. Given that online advertising is a $30B market, you can imagine FB will have no problems making a lot of revenue.