I'm just guessing here, but didn't you get a lot of your reputation from reporting bad posts? From what I can tell, most 'restricted' forums such as Staff Writers Workshop, Moderator's Place, Area 51, etc. are located within the Coffee House parent forum. It would be a logical assumption that the 'flagged bad posts' are also located within this category, and thus the reputation you receive for reporting them. I could be wrong though.