posts are not always deleted most are merged with existing threads.
I've only noticed posts being deleted when they talk about piracy or are offensive or a person is being repetitive in the threads/posts they keep making.
imo not enough posts are deleted b/c this forum is turning into total garbage with the same bs threads repeated 100x a day the past month or so. i'm finding very hard to find the interesting threads b/c of so many repetitive garbage ones