Tweet Commentluv is basically an add on as a way for bloggers to reward their commenters. What it does is to place the title of a recent blog posts of their commenter under a comment. This can be especially useful in gaining more comments.
What platforms can Commentluv be installed in?
I believe that it can be directly installed anywhere except blogger at the moment. It has a direct download for a wordpress plug-in. For blogger users, they can get the add on that is included when you download Intense Debate.
What is "Bad juju just happend"?
If the feeds are good, your comment should reflect the title of your recent blog post even before submitting. This statement will come out of there instead if it cannot locate a blog post from the site you linked or you switch URLs too much and the system is confused. If you encounter this problem, give it a minute. You should have a blog post for commentluv to work.
What is Keywordluv?
This is an added feature also made by the same developers where you can opt to have your commenters link their site next to their unlinked name. This might help you get to know your commenters a bit more if most of them are promotional products. Although this add on can be a venue for a lot of advertisement links in your blog, as it brags that one can use keywords when commenting at that site.
What is Top Commenters?
This is also a way to increase commenting participation by showcasing on your side bar those that have been commenting the most. This can mean extra backlinks from the homepage and every page of the site, which is very favorable for the commenter.
What is the bad side?
Installing these add ons will encourage spam comments just to get links. In any case, you can have these moderated or filtered by Akismet that is included when you download Intense Debate which you can toggle off manually.
If they want more comments, why are some blogs with commentluv installed No Follow?
I guess I don't get why there are those that use commentluv but are No Follow. It doesn't make sense as they will still get spam comments with commntluv installed anyhow. On the other hand, maybe they just want to reward legitimate commenters with a little something but also hope thatt they would not attract too much spam. Mind you this is not too much of a reward though as that linked site in the comment has no link juice when it is no follow even if there are double links, one for your name, and the other for your recent post.