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I was/am a Void (musl libC) user.
Void was the second-last GNU/Linux distro I was relying on for daily use. I used an automated remaster of it for about a year (actually I had one machine with an entire year of "uptime" on that, though it spent most of that time suspended between several uses per week) but then I switched to Tiny Core.
I really dislike the increasing influence of Microsoft on the Linux foundation, that made me look for alternative OSs.
This was a factor in my ditching the Linux kernel altogether, which I did this month (after more than 13 years of using it). In fact autonomy is a huge factor (maybe the largest) in why I'm using BSD.
I'm not yet using NetBSD over OpenBSD, although this week it became a possibility. I am however, using NetBSD over FreeBSD. I have NetBSD and OpenBSD installations, but no FreeBSD.
Microsoft is indeed a prime reason. I spent years migrating to GNU/Linux to get away from their regular assaults on both users and better companies. I ultimately chose Tiny Core over Void after doing analysis of 200-300 distros on DistroWatch, trying to get away from GitHub as much as possible. Between LibFFI (C lib access from other languages), Zlib1g (PNGlib is not GitHub-based, but it requires Zlib1g which is) and HarfBuzz (now in GNU Emacs) we are all reliant on Microsoft, alas. But I intend to resist it. I used GitHub too, before they sold it.
FreeBSD bases several things on GitHub, including their package manager. Most of what they host on GitHub is a mirror though. OpenBSD is the least GitHub-encumbered of the three. NetBSD's "worst" affiliation is that it accepts donations through GitHub. But I still think that's less self-defeating than what FreeBSD is doing.
I think the logo is so appropriate-- it's a cat (I like cats, but they try to be cute about everything and they treat humans like servants) in a disguise, with tentacles. That's some very strong and true-to-life branding indeed.
I could say more about why I favour NetBSD over FreeBSD, but most of it would just be FreeBSD bashing when I certainly don't think FreeBSD is all bad-- it was the first BSD I installed. NetBSD is what OpenBSD was based on, and for me that's a big point for NetBSD.
TL;DR: NetBSD is the second-most GitHub-autonomous BSD, and that's why I still have it.