Windows 10 Home starts at $130, Pro is $200, and the business licenses start at $300. Given how much of Windows market share comes from business use, it’d be surprising they weren’t making a lot of money there. Since they’re a public company it’s easy to confirm that, yes, selling the most popular operating system in the world is profitable:
He is right though, watermarked w10 has no time limit, and comes with what seems only a few limitations, like inability to customize the taskbar location, for example.