A lot of ratings-attracted people really are under the impression that a) third-party ratings are super helpful/crucial, and b) you can get some improved-objectivity from subjective feedback in the right circumstances. But you have to kind of shape the circumstances (rules/mods)
There's also the fact that a lot of commenters and posters are clearly coming from another zone, so to speak. They are feeling bad, and want others to feel bad, and so on.
So, you can get these really peculiar / odd rules & moderation frameworks in similar cases. Which make sense in context.
But yeah, it'd be interesting to know about the history or context.
I've noticed those threads get pretty sexist/racist quickly too, and doesn't appear to be moderated the same way that established subs are.
Facebook started with a HotOrNot-like site as well.
The so-called "tech" companies are getting desperate. How to get peoples' attention.