That's not any different. If I write a POSIX-compliant program then it should run on macOS without having used any of Apple's documentation. And if they charged for documentation (which is dumb) it would create a market for third party macOS documentation that I could use instead.

> But yeah, a flat fee for a wide variety of services risks edge cases where someone using only minimal resources gets a poor deal. Of course, an alternative is a nickel-and-diming pay-as-you-go micro-transaction scheme, which your main users will hate.

Offering a flat fee for everything is not inconsistent with offering individual things a la carte. They could offer both. But the bigger point is that it should be possible to produce and distribute software without having any business relationship with Apple whatsoever. I don't want to use anything they make, I just want to have access to my customers who use macOS.

> Also, strictly speaking, you don't have to pay them. Vote with your dollars and platform support as a developer. If enough people do, Apple may reevaluate

That doesn't work at this level of power imbalance. Your software would have to be important enough to get your customers to switch to a different platform, and not have any viable competitors who remain on macOS even if it means higher profits due to the reduced competition. In other words, you would have to be a monopoly yourself in order to have any leverage.