Why is This Blog on Blogger?

Maybe its a mistake from an SEO point of view not to have this blog be on the personratings.com domain. But, what happens in the likely event that PersonRatings is overwhelmed by massive quantities of traffic and the whole domain goes down? Where can fans of the site go for information on whats happening, or even be provided with a new domain for the site that does work? To the off-site blog of course. Am I wrong? By the way, the same goes for email, which is why we have both info@personratings.com and topic5@hushmail.com.