It seems Yelp is simply a sales lead tool and spam generator.
It seems Yelp is simply a sales lead tool; my most recent posting for businesses to contact me ignored the request I made and simply messaged me to offer their services; many of the providers didn't or couldn't provide what I had asked for, they were simply reaching out to try and sell me what they had to offer in spite of my very specific request. The replies were basically spam messages.