Its honestly kinda weird, bazzite and nobara are fairly big. Must be a bug
Edit: Looks like flatpack usage prevents them from monitoring OS, a lot of fedora stuff uses the flatpack for steam. Flatpack users are 5.73% of all linux users, most are on steamos.
ahhh that makes sense. thanks for tracking that down! I guess I'm a minority in using the steam rpm, I just couldn't get the flatpak to cooperate with Nvidia for whatever reason