Pierre-Loup Griffais, one of the creators of the Steam Deck gaming console and Linux- the SteamOS distribution, in an interview with The Verge, said that Valve, in addition to employing 20-30 people working on the Steam Deck product, directly pays more than 100 open source developers involved in the development of Mesa drivers, a package for launching Windows-Proton games, drivers for the Vulkan graphics API, as well as related projects such as Steam for Linux and Chromebooks.
Source: opennet.ru