Earlier quoted context omitted.
Could you imagine if people could make the kind of money developing things for Linux that they do developing things for iOS? It would make comments like yours kind of funny and relevant.
I would wager more money is made via Linux than iOS by a fairly large margin.
Without a doubt. IBM, Google, Amazon, and many, many others are deep in the Linux eco-system. Pretty much all supercomputing is done on Linux, and all the boring cloud/infrastructure/scientific stuff is done on Linux.