It has been, actually, normal for there to be corporations with revenue dwarfing the GDP of most nations on Earth (the UN is a recent distraction) for nearly as long as joint stock corporations have been a thing.
Largely because GDP isn't exactly equally distributed among countries; the median GDP of a country on Earth right now is only in the neighborhood of $15 billion, which is in the neighborhood of the GDP of a quite small city in the developed world.
> That's not a free market anymore
“Free market” is a non-existent abstract ideal, not a thing that actually exists or can exist.
I don't know about that. As someone who has worked for some of the big companies, there's a ton of efficiency gains in being able to use a common set of internal tools and software that these companies have and while the public clouds have externalized a lot of those internal tools, they haven't externalized all of them yet nor would you benefit from the common set of software reuse.
I understand that this is probably legal under the current system but there have been plenty of calls to change that system lately as it has been heavily pushed to its current shape through decades of lobbying & special interest. It's not normal for corporations to dwarf most of the nations in the UN in terms of GDP. That's not a free market anymore but a form of corporate dictatorship.