Windows 10 LTSC (for me) generally has uptime that is the equivalent of any Linux box. I’ve been using it to host Plex for several years - before hardware transcoding support in Linuxv was really up to snuff.
LTSC is what Windows should be. It’s a shame Microsoft doesn’t make it available (legally) to normal consumers.
I’ll be the heretic here, but so far as I know you are only required to make source available when you distribute binaries. And for that matter, it doesn’t even have to be online just available upon request unless you’re using a derivative GPL that added online access as a clause.
I highly doubt the users of a web interface are required to be given access to source. There are multiple GPL-licensed web servers (I am well aware Apache is not btw) and I’ve never seen one embed a code link on every page.
Tl;Dr: Lemmy does it, but I believe it’s not required. Modify away if you so choose.