I think there are some words which you cannot use in your comments on their site, if you do your comment just will not appear - mainly mention of things that might impact the revenue from referrals from the HfP site. I noticed somebody added a comment today about a BA offer that was not mentioned on the HfP site and even mentioned they expected their post to be deleted (and had to put hyphens in a word to stop it being blocked a-u-t-o-m-a-t-i-c-a-l-l-y). Looking a few hours later the comment is gone. The post did not criticize HfP or mention any other poster or person, but the post is gone now.