Google is now using it's relevancy engine in conjunction with Google local, and placing advertisements on maps. http://news.com.com/Google+experiments+with+map+ads/2100-1024_3-6054636.html well, so much for the slick, pure interface. I wonder if this will affect the APIs at all?
The adverts are still quite small so I don't expect that it will affect the system too much. People don't expect google to do things for free.