That may be. He also seems to focus on scams, rather than self votes. Perhaps there are other reasons for his focus, but from my read of his posts, he seems forthright regarding the reasons he looks where he does.

Also, not every investigation is fruitful, and those that get done first tend to be those folks less capable of scamming, as seems reasonable, and those get posted first. I know he's looking at botnets with thousands of bots, so he probably does need staff to do such work well.