As many of you blackhatters probably know, if you want to have multiple domains attached to your Hostgator account, you have to have one domain which acts as the main one. If you want to point additional domain on your account, Hostgator redirects the additional domain to subdomain of the main domain with some kind of redirection. So let's say I have 20 domains on my Hostgator account. All of them are redirected as subdomains of the main domain. As far as I'm concerned this is the only way to have multiple domains attached on single HG account. Here comes the question, does Google or other search engines or crawlers notice the fact that all of the domains are working on subdomains of the main domain or Hostgator takes care to make the redirection silently without notifying any visitor about that fact ? Thanks in advance for valuable input.