Why is the Maxine Audio Effects SDK Free on windows, but not on Linux?

Literally the title. Why is it free to download the Nvidia AFX SDK on Windows, with zero issues. However, when I go to download the Nvidia AFX SDK on Linux, quite literally everything is blocked behind an enterprise paywall? I’m not exactly asking for a lot, I’d even settle for an old version. However without this, I am unable to develop some programs I want to, that help people with disabilities. This seems absolutely ridiculous. I’m aware Linux and Nvidia don’t exactly get along, but this is taking things too far.