In many cases, neither Yelp nor Grubhub are adding value here. They are inserting themselves as rentiers because they are better at SEO (i.e. have more money) t

In many cases, neither Yelp nor Grubhub are adding value here. They are inserting themselves as rentiers because they are better at SEO (i.e. have more money) than the restaurants themselves. It amounts to a shakedown similar to domain squatting. That's not to mention the surveillance capitalism angle of phone calls that would previously be private now being recorded by Grubhub.