How Yahoo Blew It (2007)
wired.com
wired.com
I remember managing ad campaigns (around 2005-2006) on AdWords, Overture and (starting at that time) MS AdCenter. AdWords was just great to use compared to the other two. With AdWords it's relatively easy to manually or automatically manage a campaign of 30,000 keywords and hundreds or thousands of adverts. Overture's UI was simply painful even for a handful of adverts.
MS's offering as I remember required Windows or IE or something so we tended to avoid it altogether.
I guess I subscribed to the often told story that Google invented "text ads for search keywords".