Another possible reason might be outreach. NVIDIA spends big money on getting people to use their products. I have worked at two HPC centers and at both we had NVIDIA employees stationed there, whose job it was to help us get the most out of the hardware. Besides that, they also organize Hackatrons and they have dedicated software developer programs for each common application, be it LLMs, Weather Prediction or Protein Folding, not to mention dedicated libraries for pretty much every domain.