That's true, but his main idea is "I want to make money as well as write software". And some platforms are better for that than others.
Anyway, the submitter knows the answer already: The way to make money is to note where the customers are and go to them. Quite a few people are making money selling Mac and iPhone shareware, and that's not surprising. These platforms have a culture of paying for quality, and there's a limited variety of hardware and software that you have to support. Windows shareware also exists and makes money. Meanwhile, I've paid for exactly one piece of Linux software in my life (printer drivers) and AFAIK my experience there is typical. If I want to pay for quality Unix software I buy it for my Mac.
So: Choose the Mac or Windows, and go for it.
Android is a wild card. I'm a skeptic myself, but there's no sales data yet, so maybe it will be a big hit.
Anyway, the submitter knows the answer already: The way to make money is to note where the customers are and go to them. Quite a few people are making money selling Mac and iPhone shareware, and that's not surprising. These platforms have a culture of paying for quality, and there's a limited variety of hardware and software that you have to support. Windows shareware also exists and makes money. Meanwhile, I've paid for exactly one piece of Linux software in my life (printer drivers) and AFAIK my experience there is typical. If I want to pay for quality Unix software I buy it for my Mac.
So: Choose the Mac or Windows, and go for it.
Android is a wild card. I'm a skeptic myself, but there's no sales data yet, so maybe it will be a big hit.