They are called the dr. nerd, to which they are doctorate in getting merit like @fillippone.  I don't know of this guy but he is one of the fastest earning merits and making his account into legendary is not difficult. He just need to increase his activity and that's it legendary rank is waving. There are other members too that I am seeing already a  candidate in ranking up to highest rank which legendary. I was not surprise too that they were able to get some merits because if their posting habit. Anyway, we should be glad they were here in the forum for they contribute a lot in here.