It peaked at 4.05% in March. The last 2 months it went just below 4% as the Unknown category increased. For June the reverse happened, so 4.04% seems to be the real current share of Linux on Desktop as desktop clients were read properly/werent spoofed.
You can tell from the neofetch screenshots of their VMs showing weird configurations like 3 cores and 6 GB RAM with 15 minutes uptime.
Weird configs aren’t always a tell, my daily driver is a desktop with a tigerlake mobile engineering sample cpu
Are you implying that the host OS in those situations is not Linux?
Yes. Probably VirtualBox.