It's almost something I would use everyday, but I don't think bookmarks are the right approach. For example, because reddit comments tend to be higher quality than YouTube comments I use AlienTube for YouTube which replaces a YouTube video's comments with reddit threads (if they exist). I'd want a similar thing for just any article, without having to bookmark what I'm reading (or go to a separate site even).
I am curious, are you also thinking of a different solution to problem that bookmarks are solving (= keeping track of websites you want to keep track of) or just the social part (in your scenario through reddit comments being injected into any website you visit)?
I wasn't really sure of all of the benifits, then I saw the picture of the video game making example and it dawned on me... make it happen! I'm throwing money at my screen but nothing is happening.
I think it is more like Google in this case, where the algorithms have to be protected to ensure the quality of the site does not decline. They allow enough information so that people understand, but no enough that the process can be deduced. Gaming HN for front page can be a significant traffic increase hence there is a big reward in figuring out how to do it. While everyone appreciated open and honest, their appreciation does not extend past quality, if the site where continually gamed no one would stick around. Thus quality has to trump an implied open policy.
I find it really strange that in the space of an hour, three posts get ten points and are all killed. The one I point to is particularly troubling because I have never seen something like that ever get ten points here. And the person who posted that left a "?" as a comment on my submission and it was then killed.
AlienTube chrome extension: https://chrome.google.com/webstore/detail/alientube-for-yout...