See the tone of the sibling comment replying to me, but also, here's their blog:
https://redgpu.medium.com/valve-pays-to-harass-me-or-how-val...
https://redgpu.medium.com/shove-your-amplification-shader-a4...
Here's them falsely claiming they are an official Valve contractor (conversations with Valve contacts in my network denied this): https://redgpu.medium.com/redgpu-is-now-an-official-valve-co...