Las Vegas Sun Changes Comment Policy

Starting today, if you want to comment on a L.V Sun story, you have to have a facebook account, whatever that is.
The Sun claims there was too much meaness in the comment section. And granted, there was some of that from both sides- liberal and conservative. There was also some advertisements in some comments. But the Sun did a good job monitoring the comments. So, what was the real reason they changed the policy?
I believe that the Sun got tired of seeing conservatives take over the conversations and usually beat the liberal point of view. Further, I don't think the authors of articles appreciate people critiquing their articles because they are so-called professionals. Umm, no, most Sun writers are unprofessional liberal hacks who have no journalistic ethics. They insert their liberal opinions into the articles and they hate it when people call them on it.
I think this will backfire. I don't think the Sun will get as many visitors on their web site and since the Sun has pretty much given up on their print version, they need the Internet traffic to boost their advertisement rates. I don't think most people will sign up for Facebook just to comment on the Sun stories and they will lose customers.
Meanwhile the conservative LVRJ doesn't censor most comments on their web site and I think their readership will rise.
The LV Sun- Chicken Littles of the newspapers.