[Pxtl]

But with their ownership of Blogger and YouTube, they were far better positioned to build a Reddit/Disqus/whatever than they were to build a Facebook.

If they had started with the concept of "we're going to build a unified social layer for all our content-posting platforms and then integrate that into a Facebook-like environment" it likely would have gone far better for them than what they did, which is the reverse (build a Facebook-like environment and then use it as a unified social layer for all their content-posting platforms).