How Google used its quasi-monopoly power against Yelp.

It is ironic that Yelp itself is using its market power to help GrubHub cheat restaurants.

We should not try to understand this in terms of "good companies" and "bad companies". Rather, we need to prevent any companies from using their market power to get bigger. More generally, we need to make large companies split up so as to greatly increase the number of competitors in every field.

My tax proposal might help.