As I said in the Cavs game thread, I'm inclined to believe Vox Media (the parent company of SB Nation) simply does not care and is unwilling to invest any resources in fixing the problem.
If you notice, there are no advertisements in the forums here, only on the front page of CelticsBlog. My guess is that has a lot to do with it. I wouldn't be surprised if Vox Media actually wants everyone to shift to the front page, and would rather just phase out the forums.