” Where is the other 82% going?”
I assume download support such as for servers and bandwidth.
There might be patent issues that have to be dealt with.
Fonts might have to be licensed.
“I assume download support such as for servers and bandwidth.”
Absolutely not. Every fork and distro does that themselves from their own volunteer servers and services.
I didn’t mean to come off as rude, but here is the reality of volunteerism in Linux. Here are personal source server mirrors to get certain distros from. They are private and numerous. The Linux foundation has nothing to do with it.
https://linuxmint.com/edition.php?id=305