All your Netflix video streaming from Open Connect CDN Edge are served by FreeBSD. [1] Serving at 800Gbps per Server.[2] This was 4 years ago, drewg123 also hangs around on HN so I hope he read this and there are some 1.6Tbps update soon :).
NetBSD runs on everything. So it's part and sometimes NetBSD itself is running only vanity of embedded systems. A lot of these information are pre 2020. But given how slowly the embedded industry moves I wouldn't be surprised if it is still largely the same. I do wonder if it was grown though. It is also the only Rump kernel implementation that I know of.
OpenBSD ends up a lot on HN, many part of our every day internet usage are done with components maintained by them. There are a lot of network appliance and server usage using OpenBSD.
I think BSD deserves more credit, but for its license and philosophy I guess is it mostly working as intended.