The reason for the new fields is that websites like Digg.com and Slashdot allow users to rank either other’s contributions and comments, and thus determine their visibility on the site. A few users working together to promote or denote a particular story can have a significant impact on the site. This can determine how hundreds of thousands of readers see a particular story.
Adding other capitalists to your friend list on these sites will make it easier for you to positively rate pro-capitalist comments. A selfish benefit to you is that you will see more contributions by people who share your views.
So, add your usernames to your profile right now! In a week or so, I will link a list of usernames submitted thus far.