See that Alexa bar?  It's a cheat, yes it uses this subdomain, but it has blogdrive.com's rank; not egodrive.blogdrive.com's.  It hasn't it's own, it may be worth a higher one or a lower one, I don't care; fact is that either way a blog is a traffic cheat, and real webmasters with bought domains and hosts can get screwed on it.  Even a blog that is more popular than the blog host is ripped a bit and vice versa.