There are over 2.69 billion active gamers world wide.
steam only has 62 million active users daily that is not even 2%
How can you calculate world wide stats if it only targets nvidia hot spot locations.
same with AMD none of these numbers are true for the world but only locations selected by them to give them the best results.
This is why I said people trying to use the steam survey to represent the whole market are doing it wrong. And I've been saying this for years way before this report.