Google pays Google to advertise on Google make sense for Google I did a search for google.com on the google search home page to see how this search engine sees itself. And would you believe in sponsored results section toolbar.google.com are advertising their product? gee why don't they just put a text link to toolbar on the search home page. It makes sense considering how many people have their search page book marked. Guess they got plenty of money to burn so it makes business sense for them to pay for adverting on their own network instead of their rivals search.yahoo and windows live.com. Gee how much do goolge executive's get paid again?
I have seen ads about adsense too. Some thing like "Start making money from your sites with adsense". I guess google is advertising many of their products.
Folks, google not just advertising on keywords like "Google". they are advertising on keywords like SEO in other languages ("keresőoptimalizáció" in hungarian) and they are promoting AdWords. Why because People Do Click On AdWords!. More click is good. And you can guess it: Google won't pay itself.. which is kinda unfair.
they can get the best outcome by using their own resources. I have seen google adsense ads many times and I think it's a smart thing to do.