Many search engines and Alexa don't discrimiate subdomains, therefore Go.com will have a super high rank and/or link weight. Yahoo does the same and so many bi

Many search engines and Alexa don't discrimiate subdomains, therefore Go.com will have a super high rank and/or link weight. Yahoo does the same and so many big companies. I will say SEO purposes but also their whole infrastructure its quite obsolete. This whole domain, sub domain or sub folder has a looong almost-philosophical debate.