This was super disappointing, but not all that surprising.

I personally thought that the Digg public beta started out with some actual promise, people seemed to be engaging, and the devs were engaging with the community. But probably about 3 weeks in I started noticing that every single post would have maybe 1 comment at most, very rarely see a thread with 2 or more comments. 90% of posts I saw were just links to some random article, otherwise the global feed was just inundated in SEO spam