I would check out the wiki (https://safenetwork.wiki). The network's been in development for a decade, it doesn't use a blockchain, and the coin isn't the goal of the system (just a feature).
"They had a specific date to ship, and a fixed number of engineering resources. They knew their bug count had to glide down to zero by X date, and some bugs had to sadly be resolved "Won't fix." If a PM doesn't hit their schedule and ship, they get fired. This bug had to be punted."
diffuse responsibility, give some folks one-sided power, and you've got a Parreto-efficient race to the bottom.
As long as there's an awesome system like Hacker News, there'll be people trying to hack it. HN wins to the degree that it can counteract that and MAKE SURE that the 'best' ideas organically flow to the top. And pg is all over this.
I really like the idea of 'trust' / influence making your upvotes worth more than my upvotes or someone else's if you're proven to give good stuff. Hmm..