You using HIP was supported by AMD. Zluda was getting support from AMD. Not the same kind of support

Yeah, I get it now. HIP converts CUDA code to HIP code, then converts that code to ROCm (AMD) or PTX(nVidia). Zluda converts CUDA code to PTX, but that CUDA license was changed during 2021 to prevent these kinds of efforts.

This is why AMD dropped all involvements with Zluda (they were contributing code to it).