The Trading/Bidding Central's comment section isn't working for some reason. This is not new news, it has happened for a long time. I tried to address the situation to Google+, but I truly doubt there's anything they could do about it. I'm guessing that maybe there are too many comments on that post, and they don't want to buy gigabytes to store more. Hopefully, it'll work soon. For now, you may have to reply to comments to request a trade. CanadaBeatUSA2010 and phoenix0897 have tried to fix it, but it's not working. Sorry for the inconvenience.
~The blog office