That is what I have just found while I was searching something on Google. Isn't that very weird? Do you imagine a CNN commercial on Fox news? Or maybe on Expedia an ad for Orbitz? This is very weird that Google allow competitors to use its Adwords... But it also shows out that Google is dominating the market, and that it doesn't even need to be bothered by Ask.com, one of the very few competition it has to face.