"Researchers, individual artists, and students creating non-commercial projects will have access to Free Non-Commercial RenderMan the same day as the commercial release."
Unfortunately XPU will not be available in non-commercial version.
do individual artists not want to sell their work? It's more like hobbyists with no intention of making money.
This is primarily so people can learn the renderer in their free time and for educational use. It's akin to what used to be called the Personal Learning Editions in the industry.