If we remove them from the survey, this leaves us with 75% of 5.33%, which is something around 3.96%.
I think the 5.33% is a bug, 3.96% sounds more realistic and in line with the growth linux was having before.
I think this is an error on the survey. Was anybody able to talk to Valve about this? I forgot which email to send this question to.
"0 64bit" must be a few distributions lumped together by a processing script. "64bit" is probably CachyOS when comparing to last month's stats the ~8% match:
SteamOS Holo 64 bit 23.83% +23.83%
Arch Linux 64 bit 9.07% +9.07%
CachyOS 64 bit 8.59% +8.59%
Linux Mint 22.3 64 bit 6.62% +4.29%
Bazzite 64 bit 5.79% +5.79%
Freedesktop SDK 25.08 (Flatpak runtime) 64 bit 5.26% -1.08%
Ubuntu Core 24 64 bit 3.82% -0.10%
Ubuntu 24.04.3 LTS 64 bit 2.83% -0.94%
Linux Mint 22.2 64 bit 2.59% -3.98%
Other 31.58% +16.20%