There used to be quite a few very interesting and insightful people who answered questions over there. These days it's all people trying to shamelessly self-promote with very low quality answers, something Quora should have banned a long time ago.
I'd be surprised if that wasn't a decent chunk of their traffic.
Half the answers are by people calling themselves the CEO of some dinky Saas thing with five bucks recurring revenue. I don't even click on it if it comes up.