... which is why it was, and still is, common economic knowledge that the government must control marketplaces. Meaning the physical areas where trading is taking place.

We've been through this rodeo before you know. Private ownership of markets, with the obvious result monopoly abuses. Hell we've had private money and that was a total disaster too. And now we have VISA as opposed to government controlled payments.

But then people stopped caring about that. With abuse upon abuse the result. Because it's not like this result, that only by buying a prominent position on a marketplace you can have success as a seller is only the case online. This is very much true in meatspace as well.

And now almost everything you can buy is effectively through a privately owned (semi-)monopoly rather than a marketplace. From supermarkets to app stores.

Addendum: and then governments must NOT let anyone, not even other governments, force "whoever pays most" rules (like the EU is forcing through in Europe)