Earlier quoted context omitted.
> The problem with Facebook/Amazon/Google is that they have a monopoly on a specific information network, for Facebook the social graph, internet discoverability for Google, and online shopping for Amazon. None of these things are a natural monopoly. Facebook only stays relevant by buying its competitors. You don't even need to break them up, just disable acquisitions. Then Instagram would be separate, WhatsApp would…
>Just stop letting them buy their competitors. And how would you stop them from simply replacing their competitors? From the article "Budding companies that resist being acquired are pruned through flagrant copying." Would you pass a law that said Facebook can't expand their business to do anything a competitor is doing? I can't see how that would fly.
And the challenger has an advantage against a conglomerated incumbent because they can add features that reduce profits in ancillary markets the challenger isn't in. The incumbent won't want to copy that and cannibalize their other market, but the users want that feature so the challenger gains market share.