If google only had 10% of the search traffic it wouldn't just be smaller, it would be as irrelevant as Bing. So they would somehow need to advertise their way i

If google only had 10% of the search traffic it wouldn't just be smaller, it would be as irrelevant as Bing. So they would somehow need to advertise their way into a dominant position again, which is much harder than advertising just to bootstrap and aquire some custoners.