> Why 'gstatic.com' instead of 'static.google.com' or some other subdomain of the primary? Because they don't manually upload stuff hosted there, so in case so

> Why 'gstatic.com' instead of 'static.google.com' or some other subdomain of the primary? Because they don't manually upload stuff hosted there, so in case some user-generated content hurts the reputation of the domain it's served on, it isn't their main domain that suffered the reputation hit.