reallyread.it is a commenting platform and community. Uniquely, nobody is allowed to comment on any article or story they haven't fully read.
I love having access to anything I've started or completed reading and knowing that if I choose to share my comment on something i am way less likely to be met with thoughtless aggression than anywhere else on the internet.
I love having an incentive to read thoroughly. I hadn't realized how inclined I was to skim until using this extension.