A black box model, a subscription fee for API access and an exclusive licensing deal with Microsoft doesn't sound very open I mean, you can make a better argum

A black box model, a subscription fee for API access and an exclusive licensing deal with Microsoft doesn't sound very open I mean, you can make a better argument for Windows being "open". Available to a much broader section of society, as an installable product not API privileges that can be withdrawn, and a lot more of what's under the hood is exposed, documented and moddable.