I'd like it if there were more genre-specific ones, but people really don't adhere to that. A designated thread for action fantasy will end up being everything but, with psychological horror, romance, comedy, etc. People jump at every chance to link their stuff, even if it doesn't apply.
I don't mind the creative ones (like: promote, but only with memes!), but I agree there are way too many of these and they're very rarely helpful. I've been lucky to get a couple clicks when I post in them. :I