I gotta admit, even though I already knew this in the back of my head, the most surprising thing about this is that Google still uses Blogspot for stuff.
You may visit a site hosted on blogspot more often than you think. Blogspot is blocked where I live (China) so I notice immediately when I click on a blogspot link on HN. If I didn't have to deliberately turn on VPN, I might just read the post without bothering to notice where it's hosted.