"Don’t forget Digg’s demise wasn’t just the revamp, it’s that most of the front page was dominated by a few people who were literally posting all the damn time."

It was even stupider than that. Digg didn't even have a real, working promotion system. It was literally one guy who personally curated the big stories. Google almost bought them but looked under the hood and immediately bailed. The upvotes were all smoke and mirrors.