Damn, who do you know what owns business that Yelp hasn't tried to shake down? At some point you are being willfully ignorant like climate change deniers.
I have yet to see real hard proof of the long-standing Yelp shakedown allegations. Shouldn't one of these business owners have posted a recording of a phone call or meeting or something to the Web by now? Admittedly, I haven't tried very hard to find any, but GP is not unreasonable in asking for evidence.