$5 is not $$$. The article contains years of research that cost a lot of money, including traveling and visiting archives around the country and copying reams of documents. It's not just my research, but also Angelo Santino and Lennert van't Riet. The measly few dollars doesn't go to us, it helps keep this journal on organized crime and law enforcement alive so it can continue putting out well-researched cutting edge material. If you're too cheap to put out a few dollars to see the material that can answer your questions (plus other high-quality articles), then I'm not going to bother. Five dollars is cheaper than a movie theater ticket or a lunch at most places.

Regarding your second assertion, I don't know of any writer who limits his or her writing to only FBI reports.