I have long wondered this. I imagine that I am probably somewhere at the bottom of the pile.
I have noticed various things over the years, little things mainly, but things like, for example, two people can say the same thing/give the same answer to something, and despite being first the person who says it, that person can be completely ignored just because they aren't 'popular' or whatever, whilst the second person who says it is treated completely differently, as if the first person never existed. Just one example, and a small thing maybe, but certainly you can see people being treated differently over certain things.
Also, take deleted messages, I don't get very many these days, but when I do, I often point out that others have already said the same or roughly the same before, and its true..... But they weren't moderated at the time......
That said, I did get a post reinstated the time before last, so I don't want to push it!
To me 'them', i.e. the '
Chatteratti' mainly inhabit S, C&P though.