I'm a web admin and one of my customers installed this plugin. Wow. It's one of the most distasteful plugins I've seen. Now, I understand one wants to make money off of one's work, but most other plugins don't threaten to remove the plugin "if ratings are low". Also, most other plugins don't insist that one donate to the author. Also, most other plugins don't have advertising in the configuration page. Most other plugins don't force a red alert banner on every page in the backend. It advertises itself and bugs you to correctly configure the plugin. Sure, that's nice, but that should only be kept in the plugin's settings page.
I would strongly recommend shopping around for a more tasteful Facebook plugin. I know I will.