Interesting post. It's been a while since I was in law school (and it wasn't in the US) but I don't remember spending anything close to 10 hours a week doing citations. I don't remember it being a significant portion of my workload at all. I was on the editorial board of a journal where I was reviewing a lot of citations, but it was on the authors to actually do them, and if I found they weren't doing them correctly it was a simple matter of "please ensure your citations conform to our house style" (it wasn't Bluebook). I wouldn't have paid to use this software either, though it might have been a worthwhile investment for the journal itself to make (or the law school, as others have mentioned).