Just for the sake of argument, how would one go about creating a trustworthy third-party review business? Yelp has been accused of similar tactics for years with little pushback. I just don't think it's possible to create an ethical review platform on the internet. Way too much can go wrong.
Either the reviewers are paying you, the businesses being reviewed are paying you, or you're advertising. Advertising is a crapshoot, content creators won't pay to make sure their review gets posted, so that leaves the businesses being reviewed. And if your goal, as the owner of FooBar Business Reviews, is to maximize your profits, these kinds of techniques are going to start looking interesting really quick.