hmm, guess we wont know unless someone finds out, cant imagine it counting your cpus gpu as well as your discrete one though. would be pointless.
and i guess it really isnt a foregone conclusion that ryzen is selling like anything. especially if you look at this forum, you would think everyone has a 1080ti. but on the survey, its hardly anyone.
It only counts the primary rendering device - also in some cases the integrated GPU becomes disabled when a dGPU is detected and/or unless you plug a monitor into it anyhow.