I was surprised reading all the good reviews and then not being able to get it work. However, on the developer's site somebody complained about not being able to get to work on the FRONT PAGE. I then tried whether it would work for me in any content page other than the front page and voila there it was. I would rate this EXCELLENT if it would work on the front page as well.
In my web and local the plugin works in front page. I use 'onPrepareContent()', so it changes all articles loaded.
Maybe you use a plugin that is not compatible with this plugin.
If you want, you can post a message in my forum (http://www.jonijnm.es/web/foro/765-plugins.html) and we will try to find what's the problem and fix it