Honestly, I keep forgetting that Google owns Blogspot, mostly because I keep forgetting that Blogspot still exists.

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.

True. Matt Green for example uses blogspot too. http://blog.cryptographyengineering.com/

pycon blog is also on blogspot. http://pycon.blogspot.com/