It sounds like the author was making the same mistake that pretty much everybody makes: Treating your blog as though it were dynamic content. But it's not. It's static HTML, and you should never have to make any modifications to anything to make it scale.
Step one: Have your blog export all entries to plain HTML.
Step two (optional): move your imagery out to S3/Cloudfront.
That's it. That will allow your little out-of-the-box slice handle all the traffic that we can throw your way.
Scaling is an issue that you're meant to have with your product. Because your product actually needs to talk to databases and do things, it may have trouble doing those things when lots of people hit it at once. A website hosting a blog, on the other hand, needs to serve files. And that's been a solved problem for fifteen years.