Then again, since Devin Grayson actually started out as a fanfic writer, and was recruited by Denny O'Neil because he liked some of her fanfic, I shouldn't be surprised (and no, I'm not kidding about any of this).
1) Do you have a source for that? 2) So she wrote a story using pre-established characters and brought it to Denny O'Neil's attention in hopes of doing it professionally. Because no other writer does that.