Something I Don't Understand

Every now and I then I like to click on the "Next Blog" link on the upper right corner of my blog page. Sometimes you run across something interesting. I stopped doing this at work however when I came to a Brazilian blog that featuring topless women on the beach. I figured I would have trouble explaining that one away.

Anyway, every 4 or 5 blogs that come up are these absurd corporate blogs for this or that product. Are these actually effective? Do people actually go to these blogs for some reason or another? Maybe I am not so adept at understanding new forms of advertising but this makes very little sense to me.