$ whois datamantle.com | grep "Name Server" Name Server: NS1.DREAMHOST.COM Name Server: NS2.DREAMHOST.COM Name Server: NS3.DREAMHOST.COM Hrm...using dreamhost for their nameservers. Interesting choice. $ whois $(dig +short datamantle.com) | grep OrgName OrgName: Google Inc. Not dogfooding their own service? I think I'll pass.
The opposite. If they went down no one would be able to view a status page.
It's actually best practice NOT to host your site on your own network.
Just like you should not use an email address @ the same domain you are registering. If your domain had a problem they could not email you at that domain.